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    Wyświetlanie 1-44 z 44
    Tytuł:
    Intra-population genetic diversity of cultivated carrot (Daucus carota L.) assessed by analysis of microsatellite markers
    Autorzy:
    Maksylewicz, Anna
    Baranski, Rafal
    Powiązania:
    https://bibliotekanauki.pl/articles/1039480.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    SSR
    biodiversity
    genetic structure
    gene pool
    Opis:
    Intra-population variation of 18 cultivated carrot (Daucus carota L. ssp. sativus) populations of diverse origins was evaluated using codominant microsatellite (SSR) markers. Using 27 genomic and EST-derived SSR markers, 253 alleles were identified with a mean 9.4 alleles per marker. Most of the alleles (60.5%) were rare i.e., with the frequency ≤ 0.05 while only 3.95% of alleles occurred with frequency > 0.6. EST-derived SSR markers were less polymorphic than genomic SSR markers. Differences in allele occurrence allowed 16 out of 18 populations to be assigned to either the Western or Asian carrot gene pools with high probability. Populations could be also discriminated due to the presence of private alleles (25.3% of all alleles). Most populations had excess of alleles in the homozygous state indicating their inbreeding, although heterozygous loci were common in F1 hybrids. Genetic diversity was due to allelic variation among plants within populations (62% of total variation) and between populations (38%). Accessions originating from continental Asia and Europe had more allelic variants and higher diversity than those from Japan and USA. Also, allelic richness and variability in landraces was higher than in F1 hybrids and open-pollinated cultivars.
    Źródło:
    Acta Biochimica Polonica; 2013, 60, 4; 753-760
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic status of Polish larch (Larix decidua subsp. polonica (Racib. Domin)) from Chełmowa Mountain: implications for gene conservation
    Autorzy:
    Litkowiec, M.
    Lewandowski, A.
    Burczyk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078281.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    European larch
    genetic diversity
    microsatellites
    spatial genetic structure
    Opis:
    The Polish larch (Larix decidua subsp. polonica (Racib. Domin), a subspecies of European larch, is one of the most valuable forest-forming trees in Poland. It was first discovered on the Chełmowa Mountain where Natural Reserve has been established to protect this subspecies. Currently, this unique population is at risk of extinction. Nonetheless, the knowledge on the genetic diversity of this population and surround- ing larch forests is insufficient to undertake actions aimed at conservation of genetic resources. In this study, we examined the level of genetic diversity and differentiation of four subpopulations of Polish larch from Nature Reserve on the Chełmowa Mountain and surrounding areas. We used eleven nuclear microsatellite markers (SSRs) combined in two multiplex PCR reactions. In total, 344 individuals of Polish larch were genotyped and subjected to further population genetic analyses. We found the high level of genetic diversity (average: He = 0.752, Ho = 0.720) and low levels of genetic differentiation (average: Fst = 0.022). The effective population size was large and homogeneous across subpopulations (mean Ne=90.7), and we found no sign of inbreeding. The spatial genetic structure was detected in two older subpopulations but not in the younger one, suggesting its artificial origin. The old larch subpopulations were genetically homogeneous and they were related to the ancestral group of Polish lowland populations. The old larch core populations growing on Chełmowa Mountain are relatively homogeneous and they well represent the ancestral genetic group of Polish lowland larch populations. However, they still exhibit rela- tively high genetic diversity and sufficiently large effective population sizes assuring their adaptive potential for a long-term existence. Surrounding larch populations are even more genetically diverse but this might be the effect of an admixture of seed sources from various populations from a wider area of Central Europe. We recommend that specific conservation efforts should be undertaken to promote natural regeneration of the core larch populations, even supplemented by the planting of seedlings derived from the oldest larch trees. Other management actions should focus on limiting external gene flow to this unique population of Polish larch.
    Źródło:
    Dendrobiology; 2018, 80; 101-111
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The local populations of the fungus Schizophyllum commune Fr. as drivers of its biodiversity
    Autorzy:
    Boiko, Sergiy
    Powiązania:
    https://bibliotekanauki.pl/articles/2040907.pdf
    Data publikacji:
    2021
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    Schizophyllum commune
    gene drift
    genetic structure
    local populations
    terrain
    Opis:
    Changes that occur on the local level can explain the processes on the population level and, at the same time, are the driving force of species adaptation. This manuscript reports data about genetic diversities of the fungus Schizophyllum commune on the level of a local population. Objects of the study were dicarious cultures of S. commune collected from 38 basidiocarps grown on the territory of Holosiivskyi National Nature Park, Lysa Hora Regional Landscape Park and Feofaniya forest parcel (Ukraine). Results showed similarity of genetic variability of S. commune in different local populations. The heterozygote deficiency of some loci that was discovered might have resulted from new forms of allozymes that have not become widespread or due to small population sizes. The degree of differentiation of genes between local studied populations was moderate due to the high flow of genes. The absence of spatial structuration of genotypes is established, and the Mantel test showed a lack of interconnection between the genetic component and the geographical coordinates of the samples. It has been suggested that wind direction and terrain are the factors that influence the genetic structure of local populations.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2021, 63, 4; 308-316
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of changes in the genetic structure of Hucul horses based on the analysis of I type of genetic markers
    Ocena zmian w strukturze genetycznej koni huculskich na podstawie analizy markerów genetycznych klasy I
    Autorzy:
    Nogaj, A.
    Nogaj, J.
    Kozubska-Sobocińska, A.
    Rychlik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2196899.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    genetic structure
    structural change
    Hucul breed
    horse
    genetic marker
    antigen
    polymorphic protein
    Źródło:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica; 2013, 31, 2; 39-48
    0239-4243
    2083-7399
    Pojawia się w:
    Annales Universitatis Mariae Curie-Skłodowska. Sectio EE: Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Association of HindIII-polymorphism in kappa-casein gene with milk, fat and protein yield in holstein cattle
    Autorzy:
    Miluchová, Martina
    Gábor, Michal
    Candrák, Juraj
    Trakovická, Anna
    Candráková, Kristína
    Powiązania:
    https://bibliotekanauki.pl/articles/1038368.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    Holstein cattle
    milk production
    CSN3
    kappa-casein
    genetic structure
    Opis:
    The aim of this paper was to evaluate the effect of genetic polymorphism of kappa-casein on milk production in Holstein cattle. Two hundred and ten Holstein cows were used in this study. We established genotype structure of cattle population and calculated allelic frequencies based on PCR-RFLP analyses. The three genotypes: AA (69.52%), AB (27.62%), and BB (2.86%) were detected. Frequency of allele A was 83.33%, and of allele B 16.67%. The Holstein cattle kept in Slovak Republic exhibit a high value of homozygosity (0.7222) and low values of polymorphism information content (0.2392), effective number of alleles (1.3847) and level of possible variability realization (27.91%). The effect of polymorphism of CSN3 gene on average breeding values for milk production traits, such as yield of milk, fat and protein expressed in kilograms, as well as percentage content of fat and protein in milk, has been assessed. In our assessment of the observed traits' variability's dependence on CSN3 gene polymorphism, we detected a statistically significant difference between genotypes only in case of the average breeding value for the percentage of protein in milk.
    Źródło:
    Acta Biochimica Polonica; 2018, 65, 3; 403-407
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phylogenetic analysis and genetic structure of new isolates of Tomato mosaic virus in Iran
    Autorzy:
    Rakhshandehroo, F.
    Hashemi, S.S.
    Shahraeen, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/961661.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    phylogenetic analysis
    genetic structure
    new isolate
    tomato mosaic virus
    genetic differentiation
    genetic variation
    phylogenetic tree
    Tobamovirus
    Iran
    Opis:
    The present report describes the new occurrence of Tomato mosaic virus (ToMV) in cabbage, bean and Malva neglecta plants in Iran. In this study, sequence analyses of a partial RNA dependent RNA polymerases (RdRp) and complete movement protein (MP) and the coat protein (CP) nucleotide sequences of three new ToMV isolates collected from major crop fields in Iran revealed low genetic variation of RdRp gene compared to the CP and MP genes. The different topologies of the phylogenetic trees constructed, using available open reading frame (ORF1), ORF2 and ORF3 sequences from ToMV isolates, indicated different evolutionary constraints in these genomic regions. Statistical analysis also revealed that with the exception of CP other tested ToMV genes were under negative selection and the RdRp gene was under the strongest constraints. According to the phylogenetic tree it can be inferred from the nucleotide sequences of the complete CP and MP genes, that isolates from Iran and Egypt formed separate groups, irrespective of host origin. However, isolates clustered into groups with correlation to geographic origin but not the host. Analysis of the Ks*, Z* and Snn values also indicated genetic differentiation between ToMV populations. The Tajima’s D, Fu and Li’s statistical values were significantly negative for the RdRp gene of the Asian population which suggests the sudden expansion of ToMV in Asia. Taken together, the results indicate that negative selection and genetic drift were important evolutionary factors driving the genetic diversification of ToMV.
    Źródło:
    Journal of Plant Protection Research; 2018, 58, 1
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic analysis of silver-fir populations in the Beskids
    Autorzy:
    Mejnartowicz, L
    Powiązania:
    https://bibliotekanauki.pl/articles/58866.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    silver fir population
    Abies alba
    genetic distance
    isoenzyme
    Beskids Mountains
    genetic structure
    heterozygosity
    genetic analysis
    genetic diversity
    population
    genetic variation
    Opis:
    Twenty-eight isozymic loci were studied in the Beskid Mts., in four populations of common silver-fir (Abies alba): one in Beskid Makowski (BM) and three populations in Beskid Sądecki (BS). Their genetic variation and diversity were analyzed, and Nei's genetic distances between the populations were calculated. The results show that the geographical distance between the BM population and the three BS populations is reflected in genetic distances. The BM population is clearly distinct from the others. It has the lowest genetic diversity (I = 0.42), percentage of polymorphic loci (%PoL = 64.29) and number of rare alleles (NoRa = 5). Besides, the BM population has the highest observed heterozygosity (Ho = 0.291), which exceeds the expected heterozygosity (He = 0.254), estimated on the basis of the Hardy-Weinberg Principle. On the contrary, BS populations are in the state of equilibrium, which is manifested, in similar values of He = 0.262 and Ho = 0.264.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2003, 72, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic structure of Norway spruce [Picea abies (L.) Karst.] provenances tested in IPTNS-IUFRO 1964/68 experiment in Krynica
    Autorzy:
    Sabor, J.
    Kempf, M.
    Masternak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/38295.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    genetic structure
    Norway spruce
    Picea abies
    isoenzyme
    polymorphism
    seed source
    genetic distance
    experiment
    Krynica-Zdroj town
    Opis:
    The results of previous studies have shown high breeding values of Beskidian spruce. The aim of the study was to assess the genetic structure of seventeen Norway spruce provenances from the Beskidy Mts. tested in IPTNSIUFRO 1964/68 experiment in Krynica, which survived after massive wind damage on the plots. Polymorphism of five isozyme systems encoded in five loci was determined. The highest value of genetic diversity parameters: mean number of alleles per locus and observed heterozygosity was noted for progeny of spruce from the Eastern Beskidy Mts. (Na = 1.47, Ho = 0.15), and the lowest – for the provenance from the Western Beskidy Mts., Babia Góra massif and the Beskid Sądecki Mts. (Na = 1.27, Ho = 0.12). Mean genetic distance between analyzed spruce provenances was equal to 0.027.
    Źródło:
    Folia Forestalia Polonica. Series A . Forestry; 2013, 55, 1
    0071-6677
    Pojawia się w:
    Folia Forestalia Polonica. Series A . Forestry
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic diversity of wild Thymus capitatus (Lamiaceae) in Tunisia using molecular markers
    Autorzy:
    Ben El Hadj Ali, I.
    Guetat, A.
    Boussaid, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/41663.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    genetic diversity
    wild plant
    Thymus capitatus
    Lamiaceae
    Tunisia
    molecular marker
    habitat fragmentation
    conservation strategy
    genetic structure
    Opis:
    In Tunisia, Thymus capitatus L. populations are severely destroyed due to deforestation and over-collecting. The species occurs in small scattered populations decreasing progressively in size. Yet, no conservation or improvement programs are attempted to preserve and promote the potential value of this resource. In this work, we assessed the genetic diversity of nine Tunisian populations of Thymus capitatus L. from different bioclimates, using 103 polymorphic randomly amplified polymorphic DNA (RAPD) loci. The analysis of the genetic variation within and among populations is primordial to elaborate conservation and improvement programs. The species showed a low diversity within populations (0.276
    Źródło:
    Dendrobiology; 2012, 68
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cochlearia polonica Frohl. (Brassicaceae), a narrow endemic species of southern Poland: history of conservation efforts, overview of current population resources and genetic structure of populations
    Autorzy:
    Cieslak, E.
    Kazmierczakowa, R.
    Ronikier, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/56510.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Cochlearia polonica
    Brassicaceae
    endemic species
    Southern Poland
    history
    conservation effort
    current population
    population resource
    genetic structure
    genetic variation
    population structure
    Opis:
    Cochlearia polonica Fröhl. (Brassicaceae) is one of the rarest species in the Polish and European flora and a taxon endemic to a very small area in southern Poland. Due to industrial activities and subsequent transformation of habitats it was extinct in all natural localities around 1994. The persistence of the species was ensured thanks to the active protection efforts including a series of transplantations based on the material from the last and decreasing natural population. The history of conservation efforts of C. polonica provides a model example of successful active protection in the European flora. Here, we provide a complete review comprising the following aims: (i) outline of the discovery and taxonomic conceptions on C. polonica, (ii) review of conservation efforts aimed at preserving its populations, (iii) description of the existing population resources, and (iv) analysis of the genetic structure of all existing populations based on previously published data and new, supplementary results.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 3
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of genetic structure of Silesian horses from Ksiaz National Stud
    Analiza struktury genetycznej populacji koni śląskich ze Stada Ogierów Książ
    Autorzy:
    Kania-Gierdziewicz, J.
    Galka, E.
    Gierdziewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2654.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Ksiaz Stallion Herd
    horse
    Silesian breed
    animal breeding
    inbreeding
    animal genetics
    genetic structure
    genetic analysis
    genetic variability
    active population
    Opis:
    Analysis of genetic structure of Silesian horses from National Stud. The aim of the study was to analyze the genetic composition of Silesian horses bred in "Książ" National Stud basing on their pedigreesand to try to answer the following question: is the subdivision of Silesian horse population really necessary to prevent local horse breed? As the material 72 pedigrees of brood mares and stallions, born between 1991 and 2009 were used. On average, 93.1% of animals were inbred, there were 96.55% inbred stallions and 90.70% inbred mares. The mean inbreeding coefficient for all horses was 2.3%, for inbred horses it reached 2.5%. There were more inbred mares (39) than stallions (28). All 72 Silesian horses from "Książ" State Stud were related with the average relationship coefficient of 8.5%. The total and effective number of founders were 458 and 163, respectively. The total andeffective number of ancestors were 64 and 22, respectively. Among the founding breeds Thoroughbred horses predominated, the next were Oldenburg and Silesian horses, whereas among ancestors there were much more Silesian horses than Thorougbreds. All in all, the genetic diversity of the Silesian horses from "Książ" National Stud was satisfactory, however its monitoring is required because of both upward inbreeding and 100% related animals. Because the population of Silesian horses is small, less than 2,000 animals and sligtly over 1,000 animals included in conservation programme, the artifical subdivision of this population as proposed in the new breeding programme, which would result in creation of two subpopulations: “old-type” and “new-type” Silesian horses, is not recommended. For maintaining genetic diversity, it could be also possible to carefully import of semen or stallions of similar breeds, i.e. German Alt-Oldenburger horses or German Heavy Warmblood horses. The plan should also include the matings recommended within the population of all available Silesian horses of both types. The authors consider introducing such a program essential. It should be also clearly stated in the plan how large proportion of the Silesian mares population could be each year mated to Thoroughbredstallions. Division into two types implies that some fraction of new-type Silesian horses and their progeny would not be regarded as potential parents of individuals for the conservation programme.
    Analiza struktury genetycznej populacji koni śląskich z SO Ksiaż. Celem pracy była analiza struktury genetycznej koni rasy śląskiej hodowanych w Stadzie Ogierów Książ na podstawie danych rodowodowych oraz wypracowanie odpowiedzi na pytanie: czy słuszny jest założony w Programie hodowlanym koni rasy śląskiej podział na stary i nowy typ konia śląskiego z osobnymi wymogami dotyczącymi wpisu do ksiąg. Materiał: rodowody 72 koni zakwalifikowanych jako konie hodowlane (populacja aktywna). Populacją referencyjną do analiz stanowiły 72 konie należące do populacji aktywnej urodzone w latach 1991-2009. Udział osobników zinbredowanych w populacji aktywnej wynosił 93,1%, przy czym więcej było zinbredowanych ogierów niż klaczy. Średnie zinbredowanie dla wszystkich koni wynosiło 2,3%, natomiast w grupie koni zinbredowanych było równe 2,5%. Bardziej zinbredowane były klacze niż ogiery. Wszystkie badane 72 konie śląskie były ze sobą spokrewnione a średni współczynnik spokrewnienia dla nich = 8,5%. Ogólna liczba założycieli wyniosła 458, zaś przodków – 64. Efektywna liczba założycieli wynosiła 163 a przodków – 22. Wśród ras założycielskich przeważała pełna krew angielska, a następnie konie oldenburskie i śląskie. Wśród przodków występowały przeważnie konie śląskie, a udział koni pełnej krwi był niewielki. Ogólnie można stwierdzić, że zmienność genetyczna wśród koni śląskich ze SO Książ pozostaje jeszcze na zadowalająco dobrym poziomie, ale wymaga monitorowania ze względu na tendencję do wzrostu inbredu przy jednoczesnym spokrewnieniu wszystkich osobników. Ze względu na małą liczebność populacji koni śląskich (poniżej 2000 osobników, w tym nieco ponad 1000 osobników w programie ochrony zasobów genetycznych rasy) wprowadzenie bardziej restrykcyjnego podziału na dwie subpopulacje koni starego i nowego typu będzie dla rasy bardzo niekorzystne. Aby utrzymać zmienność genetyczną koni śląskich na zadowalającym poziomie korzystne byłoby również posłużenie się reproduktorami ras mających te same korzenie co rasa śląska, np. Oldenburgami w starym typie czy końmi rasy ciężkiej gorącokrwistej niemieckiej. Wprowadzenie indywidualnego planu kojarzeń w obrębie całej populacji koni śląskich jest, według autorów, niezbędne. Plan taki powinien jasno określić jaka część populacji klaczy śląskich corocznie mogłaby być ewentualnie krzyżowana z ogierami pełnej krwi angielskiej. Powinien on uwzględniać, jako sugestie dla hodowców, możliwości kojarzeń w obrębie całej dostępnej populacji koni śląskich bez podziałów na stary i nowy typ. Podział taki powoduje, że pewna część koni śląskich nowego typu i ich potomstwo nie jest brana pod uwagę jako ewentualni rodzice koni, które będą spełniały warunki programu ochrony. Na przykład pozwoliłoby to wykorzystać konie śląskie nowego typu, u których udział genów rasy śląskiej jest większy niż 75%, i które stworzyłyby „grupę wstępną programu ochrony". Ich kojarzenie z końmi starego typu mogłyby dać potomstwo (dzieci, wnuki), które spełniały by w przyszłości warunki programu ochrony, powiększając tym samym dostępną pulę genów.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2018, 57[1]
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    AFLP analysis reveals infraspecific phylogenetic relationships and population genetic structure of two species of Aconitum in Central Europe
    Autorzy:
    Mitka, J.
    Boron, P.
    Wroblewska, A.
    Baba, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/59372.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    AFLP method
    phylogenetic relationship
    population structure
    genetic structure
    Aconitum
    taxonomy
    population genetics
    evolution
    Sudetes Mountains
    Central Europe
    Opis:
    The genetic diversity of two Aconitum species endemic to the Carpathian Mountains and Sudetes was studied. A reticulate evolution between them was earlier postulated as an effect of secondary contact. The genetic diversity at the individual and taxonomic levels was examined across the entire geographical ranges of the taxa in 11 populations based on 247 AFLP markers found in 112 individuals in the Sudetes and Western Carpathians. The overall genetic differentiation was greater within the Sudetic A. plicatum (Fst = 0.139, P < 0.001) than within the Carpathian A. firmum (Fst = 0.062, P < 0.001), presumably due to the long-lasting geographic isolation between the Giant Mts and Praděd (Sudetes) populations of the species. Interestingly, relatively distant and presently isolated populations of A. plicatum and A. f. subsp. maninense share a part of their genomes. It could be an effect of their common evolutionary history, including past and present reticulations. The introgression among infraspecific taxa of Aconitum is common, probably as a result of seed dispersal within a distance of ca. 20 km (Mantel's r = 0.36, P = 0.01). Aconitum f. subsp. maninense had the highest genetic diversity indices: Nei's h and rarefied FAr, and divergence index DW (P < 0.05), pointing to its presumably ancient age and long-term isolation.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2015, 84, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low genetic diversity in the endangered population of Viola uliginosa in its locus classicus at Rzaska near Cracow [southern Poland] as revealed by AFLP markers
    Autorzy:
    Cieslak, E
    Paul, W.
    Ronikier, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/58111.pdf
    Data publikacji:
    2006
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    genetic diversity
    endangered population
    Viola uliginosa
    Rzaska n.Krakow
    Polska
    AFLP marker
    plant conservation
    rare plant
    threatened plant
    wet habitat
    genetic structure
    population structure
    Opis:
    An extremely endangered population of Viola uliginosa Besser at the classical locality of this taxon has been studied. The AFLP analysis was based on 18 specimens of V. uliginosa (about 10% of preserved individuals); additionally, two individuals of V. riviniana were included in the data set as the out group. A high genetical uniformity of the whole population (similarity indexes close to 1) was detected. It was not correlated significantly with the spatial distribution of the plants. The study serves as a basis for practical conservation measures and at the same time as a starting point for a more extensive research on the genetical variability of the species throughout its range.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2006, 75, 3; 245-251
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differentiation and genetic structure of Sclerophoma pythiophila (Corda) v. Hoehn. strains associated with various damage and disease symptoms on Pinus sylvestris L.
    Zróżnicowanie i struktura genetyczna szczepów Sclerophoma pythiophila (Corda) v. Hoehn. związanych z różnymi typami objawów chorobowych i uszkodzeń na Pinus sylvestris L.
    Autorzy:
    Kraj, W.
    Kowalski, T.
    Zarek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/27447.pdf
    Data publikacji:
    2009
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    differentiation
    genetic structure
    Sclerophoma pythiophila
    fungal strain
    fungi association
    damage
    plant disease
    disease symptom
    Pinus sylvestris
    Contarinia baeri
    Thecodiplosis brachyntera
    Opis:
    Eighty-three strains of Sclerophoma pythiophila were isolated in the period between 1996 and 2006 from needles and shoots of Pinus sylvestris displaying various types of disease symptoms or damages caused by Contarinia baeri or Thecodiplosis brachyntera. On the basis of fifty-six RAMS markers, very high genetic variability of examined strains was ascertained (mean value of Jaccard’s coefficient 0.58). The highest genetic similarity was shown by strains related with needles damaged by Contarinia baeri (0.65), whereas the lowest by those derived from dead shoot tips (0.53). No monomorphic markers were found for individual groups of strains, yet on the basis of Nei’s genetic distance matrix, it was possible to determine a group of closely related fungus populations which was connected with the damaging of the needles by C. baeri or T. brachyntera (Nei’s coefficient ranging from 0.035 to 0.059) and populations related with the occurrence of necrosis on shoots or decay of their tips (Nei’s coefficient – 0.066). The PCA confirmed genetic similarity of strains related with damaging of the needles by insects and strains isolated from local necroses on shoots and withered shoot tips. A high level of genetic variability between populations was shown by AMOVA analysis. A high level (14.9%) and statistically significant (P=0.001) share of between-population genetic variability were ascertained.
    Osiemdziesiąt trzy szczepy Sclerophoma pythiophila były izolowane w okresie 1996 – 2006 z igieł i pędów Pinus sylvestris wykazujących różne typy objawów chorobowych lub uszkodzeń spowodowanych przez Contarinia baeri lub Thecodiplosis brachyntera. Na podstawie 56 uzyskanych markerów RAMS stwierdzono bardzo wysokie zróżnicowanie genetyczne badanych szczepów (średnia wartość wsp. Jaccarda 0.58). Największe podobieństwo genetyczne wykazywały szczepy związane z uszkodzeniem igieł przez Contarinia baeri (0.65), natomiast najmniejsze pochodzące z zamarłych szczytów pędów (0.53). Nie stwierdzono monomorficznych dla poszczególnych grup szczepów markerów, jednak na podstawie macierzy odległości genetycznej Nei wyróżniono grupę blisko spokrewnionych populacji grzyba związanych z uszkodzeniem igieł przez C. baeri lub T. brachyntera (wsp. Nei od 0.035 do 0.059) oraz populacji związanych z występowaniem nekroz na pędach lub zamieraniem ich szczytów (wsp. Nei 0.066). Analiza PCA potwierdziła podobieństwo genetyczne szczepów związanych z uszkodzeniem igieł przez owady oraz szczepów izolowanych z lokalnych nekroz na pędach i zamarłych szczytów pędów. Wysoki stopień zróżnicowania genetycznego między populacjami wykazała analiza AMOVA. Stwierdzono duży (14.9%), wysoce statystycznie istotny (P=0.001) udział miedzypopulacyjnej zmienności genetycznej.
    Źródło:
    Acta Agrobotanica; 2009, 62, 1
    0065-0951
    2300-357X
    Pojawia się w:
    Acta Agrobotanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    ISSR analysis points to relict character of Aconitum bucovinense Zapal. (Ranunculaceae) at the range margin
    Autorzy:
    Boron, P.
    Zalewska-Galosz, J.
    Sutkowska, A.
    Zemanek, B.
    Mitka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/59093.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Carpathians Mountains
    conservation genetics
    endemic species
    marginal population
    schizo-endemism
    relict population
    Aconitum bucovinense
    Ranunculaceae
    Polish Red Data Book of Plants
    genetic diversity
    genetic structure
    ISSR technique
    Opis:
    Aconitum bucovinense, a high-mountain species endemic to the Eastern and Southern Carpathians, including the Apuseni Mountains, is legally protected and classified in the Polish Red Data Book of Plants. It attains its NW geographical range in two peripheral populations in the Western Bieszczady Mountains (Polish Eastern Carpathians), isolated by a distance of 13.1 km. PCR-ISSR analysis has been used to elucidate the within- and among-populational levels of species genetic diversity. A UPGMA and block clustering showed discreteness of the populations and subpopulations based on ISSR banding pattern. Analysis of Molecular Variance (AMOVA) revealed significant divergence (P = 0.024) of the two marginal populations and highly significant (P < 0.001) differentiation of subpopulations within populations. The theta index calculated for the two marginal populations and the core population in the Carpathians was 0.131 ±0.030 S.D. Most of the population-genetic diversity indices of the marginal populations were not different from those in the core area but the Shannon’s and rarity indices were lower in the marginal populations. It seems that founder effect and subsequent genetic bottleneck resulted in a fine-scale population genetic structure. The marginal populations under study need a relevant recovery program to maintain their genetic diversity.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Określenie pochodzenia wyłączonych drzewostanów nasiennych sosny rychtalskiej (Pinus sylvestris L.) z wykorzystaniem markerów mikrosatelitarnych
    Determination of the origin of the rychtal Scots pine (Pinus sylvestris L.) seed tree stands using microsatellite markers
    Autorzy:
    Wójkiewicz, B.
    Żukowska, W.B.
    Urbaniak, L.
    Kowalczyk, J.
    Litkowiec, M.
    Lewandowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/985719.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    sosna zwyczajna
    Pinus sylvestris
    sosna rychtalska
    drzewostany nasienne
    pochodzenie roslin
    zmiennosc genetyczna
    analiza DNA
    markery mikrosatelitarne
    scots pine
    genetic variation
    gene pool
    genetic structure
    ssr markers
    Opis:
    The rychtal pine is one of the most valuable ecotypes of Scots pine (Pinus sylvestris L.) approved for the breeding purposes in Poland. However, it occupies stands typical for oaks and beeches as shown by the compatibility analysis of species composition in relation to the habitat type in which they occur. Such result raises some doubts in terms of the naturalness of the rychtal pine and calls its history and origin into question. In the present study, we used the set of nuclear microsatellite markers to characterize and compare the gene pool composition of the selected seed tree stands of the rychtal pine with 200−year−old pine trees which grow at the Syców Forest District (SW Poland). We aimed to know to what extent the set of alleles specified for the group of the oldest trees from natural habitats is represented in the younger forest tree stands of the rychtal pine. The analysis of molecular variance (AMOVA) and clustering analysis showed that the gene pool of the studied pine populations was homogenous (FST=0,02%, K=1). The parameters of genetic variation were similar for all populations except for the mean number of alleles. On average, 25 new alleles were found in two rychtal pine seed tree stands as compared to the set of alleles found in the group of old pine trees. However, all alleles defined for old pines were also present in the gene pool of younger rychtal pine forest stands. The differences in the gene pool richness result most likely from quite high differences in the number of individuals analyzed from each population. In conclusion, our results indicate the common origin of the studied Scots pine populations.
    Źródło:
    Sylwan; 2019, 163, 08; 637-644
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic structure of Picea abies populations growing on extreme sites as revealed by isoenzyme markers: a case study from Slovenia and Bosnia and Herzegovina
    Autorzy:
    Ballian, D
    Bogunic, F.
    Bozic, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/41007.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    international conference
    Europe
    forest ecosystem
    plant breeding
    tree
    Norway spruce
    Picea abies
    plant population
    genetic structure
    extreme site
    isoenzyme marker
    genetic variation
    gene polymorphism
    forest tree
    Slovenia
    Bosnia and Herzegovina
    forest community
    Sphagno-Piceetum community
    Opis:
    Three populations of Norway spruce from ecologically extreme environments in Slovenia and Bosnia and Herzegovina were examined for genetic polymorphism. The spruces there grow in specific forest communities (Sphagno-Piceetum) which represent the remnants of the post-glacial vegetation. The aim of the study was to search for similarities in the genetic variation among populations adapted to such conditions. In total, 10 isoenzyme systems involving 16 gene loci were analysed. The results showed differences in genetic differentiation at loci Got-B, Skdh-A and 6-Pgdh-C between the two Slovenian populations and the Bosnian population, but also indicated an interestingly close relationship between the Slovenian population Pohorje and the Bosnian population Nišići.
    Źródło:
    Dendrobiology; 2009, 61 Supplement
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Profil genetyczny najstarszych drzew Picea abies (L.) Karst. w Puszczy Białowieskiej
    Genetic profile of the oldest Picea abies (L.) Karst. trees in the Białowieza Primeval Forest
    Autorzy:
    Wojnicka-Półtorak, A.
    Celiński, K.
    Chudzińska, E.
    Prus-Głowacki, W.
    Korczyk, A.F.
    Powiązania:
    https://bibliotekanauki.pl/articles/991114.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    Puszcza Bialowieska
    drzewa lesne
    swierk pospolity
    Picea abies
    drzewa stare
    struktura genetyczna
    populacje roslin
    profil genetyczny
    markery izoenzymatyczne
    genetic structure
    picea abies
    isoenzymatic markers
    białowieża primeval forest
    Opis:
    The aim of this study was to: 1) describe the genetic structure of the population of old Picea abies trees in the Białowieża Primeval Forest and 2) design the genetic database for every examined tree in scope of 26 isoenzymatic loci containing: the genotype pattern, the number of stated alleles and the level of individual heterozygosity. We found that 101 out of 117 trees are characterized by a unique genotype pattern and 20 ones are completely homozygous individuals. The oldest Norway spruces in the Białowieża Primeval Forest are characterized by rather low level of genetic variation and their homozygous genotypes that are well adapted to their environment let them live to a ripe old age.
    Źródło:
    Sylwan; 2014, 158, 05; 370-376
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution, genetic structure and ecological role of Dreissena polymorpha (Pallas) in Lake Dabie, Western Pomerania, Poland
    Autorzy:
    Piesik, Z.
    Zielinski, R.
    Wachowiak-Zielinska, M.
    Ochman, T.
    Soroka, M.
    Polok, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/85237.pdf
    Data publikacji:
    1998
    Wydawca:
    Akademia Pomorska w Słupsku
    Tematy:
    distribution
    genetic structure
    ecological role
    Dreissena polymorpha
    Lake Dabie
    West Pomeranian region
    Polska
    Pomeranian region
    bottom
    lake
    phytoplankton
    biomass
    age composition
    polymorphism
    water body
    zebra mussel
    Odra River
    estuary
    Opis:
    Dreissena polymorpha inhabits about 46.5% of the bottom area in Lake Dabie. It is most abundant in the northern part of the lake and sporadically occurs in its southern part. The average density of the zebra mussel is 891 individuals/m², while its wet weight is 1374 g/ m². In the settled areas the density of the zebra mussel reaches 1734 individuals/ m². There were presently established 7 age-groups from 0 to 6+. The highest number of specimens occurred in the age-groups between 1+ and 3+, while the lowest number - in the groups 0, 5 and 6+. Strong eutrophication and pollution of Lake Dabie on its southern side, combined with sedimentation of the extensive amounts of seston carried in by the Płonia and Regalica rivers, do not create favourable conditions for development of Dreissena. D. polymorpha plays a very positive role in the lake ecosystem through its biofiltrating action, contributing thus to an increase of water clarity and to limitation of phytoplankton development through cumulating nutrients in its biomass. Electrophoretic analysis of 9 enzymatic loci revealed strong polymorphism of the studied population of the zebra mussel: percent of polymorphic loci - 100, mean number of alleles in locus – 3.4, coefficient of expected heterozygosity per locus in the population, HS - 0.335, percentage of separate genotypes - 69%, in this number unique genotypes - 58%. A very strong scattering of the alleles was stated within the entire population. In each aggregation, on average, 90% of the specimens have a separate genotype. Each of the five defined groups of D. polymorpha, representing profiles I-V, respectively, had similar genetic composition. The values of the genetic similarity among the studied groups of the zebra mussel ranged from 0.96 to 0.99.
    Źródło:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline; 1998, 02
    1643-0115
    Pojawia się w:
    Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic-based approach to the functional-modular structure design of packaging machines
    Autorzy:
    Varanitskyi, T
    Palchevskyi, B
    Powiązania:
    https://bibliotekanauki.pl/articles/117989.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Promocji Wiedzy
    Tematy:
    packaging
    machine
    design
    genetic algorithm
    structure
    Opis:
    The paper presents a method for decomposition of packaging machine structure in order to provide the designer with choices for feasible assemblies. The aim is at providing a systematic approach to explore a large number of decompositions prior to the detailed component design phase. The structure is transformed to a graph with equivalent topology by a genetic algorithm.
    Źródło:
    Applied Computer Science; 2013, 9, 1; 54-68
    1895-3735
    Pojawia się w:
    Applied Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of genetic diversity of Ficus carica L. (Moraceae) collection using simple sequence repeat (SSR) markers
    Autorzy:
    Marcotuli, I.
    Mazzeo, A.
    Nigro, D.
    Giove, L.
    Giancaspro, A.
    Colasuonno, P.
    Prgomet, Ž.
    Prgomet, I.
    Tarantino, A.
    Ferrara, G.
    Gadaleta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/12664546.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    Moraceae
    common fig
    Ficus carica
    population structure
    genetic analysis
    genetic diversity
    SSR marker
    Opis:
    Modern technologies and accurate information on genetic diversity and structure are contributing to improve the plant breeding, in particular for all the minor species with a lack of data. Genetic diversity of 139 different Ficus carica L. genotypes collected from Italy and Croatia, and divided into two subgroups: uniferous (only main crop) and biferous (breba and main crop), was investigated using 49 microsatellite markers. A total of 70 alleles were generated, of which 64 (91.4%) showed a polymorphic pattern indicating high level of genetic diversity within the studied collection. The mean heterozygosity over the 64 single locus microsatellites was 0.33 and the expected and observed averaged variance were 16.50 and 184.08, respectively. The 139 fig genotypes formed two clusters in the PCoA analysis, suggesting a division between Italian and Croatian genotypes. Moreover, the fig accessions could be divided into two main clusters based on the STRUCTURE analysis according to the biological type, uniferous or biferous, with partly overlapping varieties. In conclusion, our results demonstrated that molecular markers were able to discriminate among genotypes and useful for the authentication of fig tree varieties (homonymies and synonymies).
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 4; 93-109
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of the crystalline structure of the complex system containing doped polyaniline by use of genetic algorithms
    Autorzy:
    Kozik, T.
    Luzny, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/134891.pdf
    Data publikacji:
    2015
    Wydawca:
    Tomasz Mariusz Majka
    Tematy:
    polyaniline
    genetic algorithms
    computer modeling of crystalline structure
    Opis:
    The structure of polyaniline (PANI) protonated with camphorsulphonic acid (CSA) has been subject to research for a long time. Despite several, various models being proposed throughout the years, there is still no model widely accepted as the only correct and final one of its crystalline phase. In this paper a computer program named MoleculeEditor is described. Created basing on the concepts of an existing but significantly different program named CrystalFinder, it is a software dedicated to finding a model of the crystalline regions of the PANI/CSA system based on an input X-ray diffraction pattern. In its search it takes advantage of the genetic algorithm technique for optimizing the model parameters to fit the computed diffraction pattern to the one loaded as input. A successful example of it being employed to find the parameters of a prepared beforehand, fictional structure of the system, is presented. Conclusions drawn from this application of the prepared software cannot be ignored in the further search for the actual model of this complex system using this program. Obtaining results from MoleculeEditor for actual, experimental data is however still in progress.
    Źródło:
    Journal of Education and Technical Sciences; 2015, 2, 1; 9-14
    2300-7419
    2392-036X
    Pojawia się w:
    Journal of Education and Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural weight minimization of high speed vehicle-passenger catamaran by genetic algorithm
    Autorzy:
    Sekulski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/258678.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship structure
    optimization
    topology optimization
    sizing optimization
    genetic algorithm
    Opis:
    Reduction of hull structural weight is the most important aim in the design of many ship types. But the ability of designers to produce optimal designs of ship structures is severely limited by the calculation techniques available for this task. Complete definition of the optimal structural design requires formulation of size-topology-shape-material optimization task unifying optimization problems from four areas and effective solution of the problem. So far a significant progress towards solution of this problem has not been achieved. In other hand in recent years attempts have been made to apply genetic algorithm (GA) optimization techniques to design of ship structures. An objective of the paper was to create a computer code and investigate a possibility of simultaneous optimization of both topology and scantlings of structural elements of large spacial sections of ships using GA. In the paper GA is applied to solve the problem of structural weight minimisation of a high speed vehicle-passenger catamaran with several design variables as dimensions of the plate thickness, longitudinal stiffeners and transverse frames and spacing between longitudinals and transversal members. Results of numerical experiments obtained using the code are presented. They shows that GA can be an efficient optimization tool for simultaneous design of topology and sizing high speed craft structures.
    Źródło:
    Polish Maritime Research; 2009, 2; 11-23
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Genetic Algorithm to Determine Thermal Properties of Microelectronic Layered Structures
    Autorzy:
    Arsoba, R.
    Suszyński, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/92932.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
    Tematy:
    genetic algorithm
    inverse problem
    microelectronics
    thermal properties
    layered structure
    Opis:
    In the paper, possibilities of application of genetic algorithms to determine thermal properties depth profile in microelectronic layered structures were presented. A developed computational method was described and results obtained using the method for a thyristor structure were presented.
    Źródło:
    Studia Informatica : systems and information technology; 2008, 1(10); 15-26
    1731-2264
    Pojawia się w:
    Studia Informatica : systems and information technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the border between biology, mathematics and computer science
    Autorzy:
    Formanowicz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/80778.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mathematics
    computer science
    biology
    computational biology
    bioinformatics
    algorithm
    biological process
    biological structure
    biological discovery
    genetic code
    genome
    protein 3D structure
    genetic information
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving energy compaction of a wavelet transform using genetic algorithm and fast neural network
    Autorzy:
    Stolarek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/964025.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    wavelet transform
    neural networks
    genetic algorithms
    signal processing
    lattice structure
    Opis:
    In this paper a new method for adaptive synthesis of a smooth orthogonal wavelet, using fast neural network and genetic algorithm, is introduced. Orthogonal lattice structure is presented. A new method of supervised training of fast neural network is introduced to synthesize a wavelet with desired energy distribution between output signals from low–pass and high–pass filters on subsequent levels of a Discrete Wavelet Transform. Genetic algorithm is proposed as a global optimization method for defined objective function, while neural network is used as a local optimization method to further improve the result. Proposed approach is tested by synthesizing wavelets with expected energy distribution between low– and high–pass filters. Energy compaction of proposed method and Daubechies wavelets is compared. Tests are performed using image signals.
    Źródło:
    Archives of Control Sciences; 2010, 20, 4; 417-433
    1230-2384
    Pojawia się w:
    Archives of Control Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minimizing the Makespan and Total Tardiness in Hybrid Flow Shop Scheduling with Sequence-Dependent Setup Times
    Autorzy:
    Mousavi, Seyyed Mostafa
    Shahnazari-Shahrezaei, Parisa
    Powiązania:
    https://bibliotekanauki.pl/articles/2201180.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dispatching rule
    genetic algorithm
    hybrid flow shop
    neighborhood search structure
    Opis:
    The paper considers the production scheduling problem in a hybrid flow shop environment with sequence-dependent setup times and the objectives of minimizing both the makespan and the total tardiness. The multi-objective genetic algorithm is applied to solve this problem, which belongs to the non-deterministic polynomial-time (NP)-hard class. In the structure of the proposed algorithm, the initial population, neighborhood search structures and dispatching rules are studied to achieve more efficient solutions. The performance of the proposed algorithm compared to the efficient algorithm available in literature (known as NSGA-II) is expressed in terms of the data envelopment analysis method. The computational results confirm that the set of efficient solutions of the proposed algorithm is more efficient than the other algorithm.
    Źródło:
    Management and Production Engineering Review; 2023, 14, 1; 13--24
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlated mutations in selected protein families
    Autorzy:
    Leluk, J.
    Sobczyk, M.
    Becella, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/1986920.pdf
    Data publikacji:
    2002
    Wydawca:
    Politechnika Gdańska
    Tematy:
    protein sequence
    multiple alignment
    tertiary structure
    mutational correlation
    genetic semihomology algorithm
    Opis:
    Four different protein families (two proteinase inhibitor families, myoglobins and lysozymes) were surveyed for correlated mutations with respect to the position distance and their significance in structure stabilization and biological activity. They were chosen for this study in order to verify the currently admitted model of mutational correlation relationship with respect to spatial contact of the residues and contribution in protein biological activity. There was observed high contribution of spatially dispersed residues (which are also not involved in the protein active center) in mutational correlation. Because of the significantly large distance between correlated positions these cases do not correspond explicitly to any mechanism included in current hypotheses. It is suggested that the role of residue spatial contact in structure preservation, intermolecular interaction and active site rescue mechanisms only partially explains the correlation phenomenon.
    Źródło:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 3; 469-482
    1428-6394
    Pojawia się w:
    TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part II. Computational simulations
    Autorzy:
    Sekulski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260598.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship structure
    multi-objective optimization
    evolutionary algorithm
    genetic algorithm
    Pareto domination
    Opis:
    Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimum structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems of the four areas and giving an effective solution of the problem. So far, a significant progress towards the solution of the problem has not been obtained. An objective of the present paper was to develop an evolutionary algorithm for multiobjective optimization of structural elements of large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in detail. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution, is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area on a high speed vehicle-passenger catamaran structure, with several design variables, such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinal and transversal members, taken into account. Details of the computational models were at the level typical for conceptual design. Scantlings were analyzed by using selected rules of a classification society. The results of numerical experiments with the use of the developed algorithm, are presented. They show that the proposed genetic algorithm can be an efficient tool for multi-objective optimization of ship structures. The paper is published in three parts: Part I: Theoretical background on evolutionary multi-objective optimization, Part II: Computational investigations, and Part III: Analysis of the results.
    Źródło:
    Polish Maritime Research; 2011, 3; 3-30
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic predisposition to breast and/or ovarian cancer – focus on the candidate BARD1 gene
    Autorzy:
    Klonowska, K.
    Ratajska, M.
    Wojciechowska, M.
    Kozlowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/80894.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    breast cancer
    ovarian cancer
    genetic predisposition
    BRCA1 gene
    structure
    function
    BARD1 gene
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2014, 95, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic diversity of North African Thymus algeriensis in Tunisia: Population structure and implication for conservation
    Autorzy:
    Ben El Hadj Ali, I.
    Guetat, A.
    Boussaid, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/41188.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    genetic diversity
    North Africa
    Thymus algeriensis
    Tunisia
    population structure
    molecular marker
    natural population
    conservation
    Opis:
    The genetic diversity within and among nine natural populations of Thymus hirtus Willd. subsp. algeriensis (Boiss. et Reut.) Murb. from different geographical and bioclimatic zones were assessed using Random Amplified Polymorphic DNA data. A total of 154 bands were generated from seven selected primers. 141 bands were polymorphic (P=91.56%). The genetic diversity within a population based on Shannon's index which was high (H'pop=0.307) and varied according to bioclimatic zones. A high genetic differentiation among populations (GST=0.335 and FST=0.296) was revealed, suggesting a population isolation and a low level of gene flow among them. The major proportion of the variation was attributable to individual differences within populations. The genetic structure is in accordance with geography distances. The Neighbour- joining tree based on Nei's and Li's genetic distance among individuals showed that individuals from each population clustered together. The UPGMA dendrogram based on FST values revealed three clusters each of them includes populations closuring to their geographical origin. The high genetic structure of populations resulted from genetic drift caused both by the habitat fragmentation and the low size of most populations. The in situ conservation should interest all populations. The ex situ conservation should be based on the collection of seeds rather within than among populations because of the maximum of variation was revealed within populations.
    Źródło:
    Dendrobiology; 2012, 67
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic variation and population structure of three Trifolium species
    Autorzy:
    Bulinska-Radomska, Z
    Powiązania:
    https://bibliotekanauki.pl/articles/2047280.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Trifolium montanum
    enzyme
    population structure
    Trifolium fragiferum
    Trifolium campestre
    polymorphic locus
    Trifolium
    genetic variation
    Opis:
    Three diploid Trifolium (Fabaceae) species, T. campestre, T.fragiferum and T. montanum, were electrophoretically assayed to elucidate the range and organization of genetic variation in relation to the mating system, reproduction mode and longevity of the species. T. campestre is an annual self-pollinated species. T.fragiferum and T. montanum are cross-pollinated perennials. The former species reproduces both sexually and vegetatively, whereas the latter relies solely on sexual reproduction. Several populations of each species collected throughout Poland were surveyed for 15 enzymes. The measures of variation included: proportion of polymorphic loci per population, average number of alleles per locus, average gene diversity (He) and genetic distance (D). To describe the organization of diversity in each species, total genetic variation per locus (Ht) was calculated and partitioned into intra-(Hs) and inter-(Dst) populational components. Both cross-pollinated species had more polymorphic loci, higher numbers of alleles per locus and higher level of diversity than self-pollinated T. campestre. Most of genetic variation of the latter species was allocated among populations unlike in T.fragiferum and T. montanum.
    Źródło:
    Journal of Applied Genetics; 1996, 37, 2; 153-160
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part I. Theoretical background on evolutionary multi objective optimization
    Autorzy:
    Sekulski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/259303.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship structure
    multi-objective optimization
    evolutionary algorithm
    genetic algorithm
    Pareto domination
    set of non-dominated solutions
    Opis:
    Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimal structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems from these four areas and giving an effective solution of this problem. So far, a significant progress towards the solution of this problem has not been obtained. An objective of the present paper was to develop an evolutionary algorithm for multi-objective optimization of the structural elements of the large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in details. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area on a high speed vehicle-passenger catamaran structure with several design variables, such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinals and transversal members. Details of the computational models were at the level typical for conceptual design. Scantlings were analyzed using the selected rules of a classification society. The results of numerical experiments with the use of the developed algorithm are presented. They show that the proposed genetic algorithm can be an efficient multi-objective optimization tool for ship structures optimization. The paper will be published in three parts: Part I: Theoretical background on evolutionary multi-objective optimization, Part II: Computational investigations, and Part III: Analysis of the results.
    Źródło:
    Polish Maritime Research; 2011, 2; 3-18
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A novel polymorphic mtDNA marker for population studies of the pink shrimp, Farfantepenaeus duorarum (Crustacea, Penaeidae)
    Autorzy:
    Grabowski, M.
    Grater, W.D.
    Stuck, K.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/47488.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    pink shrimp
    Atlantic coast
    Penaeidae
    mtDNA marker
    population structure
    Farfantepenaeus duorarum
    Mexico Gulf
    Crustacea
    genetic marker
    Opis:
    The pink shrimp, Farfantepenaeus duorarum, is one of the most important shrimp species commercially harvested along the Gulf and Atlantic coasts of the US. In this study we developed a mitochondrial marker suitable for population studies of the species. A 611–617 bp hypervariable portion of the AT-rich region of the mt genome was amplified and sequenced. The 617 bp long consensus sequence contained 15 polymorphic insertion/deletion sites and 165 polymorphic substitution sites. Kimura 2-parameter distances ranged from 0.00 to 0.06 with a mean of 0.02. Among the 104 sequences, 100 haplotypes were counted if all mutations were included. If transitions were omitted, 34 haplotypes were observed. The results indicate that the hypervariable portion of the AT-rich region may be an effective marker for revealing the genetic structure of the pink shrimp off the southeast US.
    Źródło:
    Oceanologia; 2004, 46, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-objective optimization of high speed vehicle-passenger catamaran by genetic algorithm. Part II. Analysis of the results
    Autorzy:
    Sekulski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/260079.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    ship structure
    multi-objective optimization
    evolutionary algorithm
    genetic algorithm
    Pareto domination
    set of non-dominated solutions
    Opis:
    Real ship structural design problems are usually characterized by presence of many conflicting objectives. Simultaneously, a complete definition of the optimum structural design requires a formulation of size-topology-shape-material optimization task unifying the optimization problems from the four areas and giving an effective solution of the problem. Any significant progress towards solving the problem has not been obtained so far. An objective of the present paper was to develop an evolutionary algorithm for multiobjective optimization of the structural elements of large spatial sections of ships. Selected elements of the multi-criteria optimization theory have been presented in detail. Methods for solution of the multi-criteria optimization problems have been discussed with the focus on the evolutionary optimization algorithms. In the paper an evolutionary algorithm where selection takes place based on the aggregated objective function combined with domination attributes as well as distance to the asymptotic solution, is proposed and applied to solve the problem of optimizing structural elements with respect to their weight and surface area for a high - speed vehicle-passenger catamaran structure, with taking into account several design variables such as plate thickness, scantlings of longitudinal stiffeners and transverse frames, and spacing between longitudinal and transversal members. Details of the computational models were kept at the level typical for conceptual design stage. Scantlings were analyzed by using the selected classification society rules. The results of numerical experiments with the use of the developed algorithm are presented. They show that the proposed genetic algorithm may be considered an efficient tool for multi-objective optimization of ship structures. The paper has been published in the three parts: Part I: Theoretical background on evolutionary multiobjective optimization, Part II: Computational simulations, and Part III: Analysis of the results.
    Źródło:
    Polish Maritime Research; 2011, 4; 3-13
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic, phenotypic and environmental trends of conformation traits in arctic fox Alopex lagopus [L.]
    Autorzy:
    Wierzbicki, H
    Filistowicz, A.
    Przysiecki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2043152.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Polish farm
    environment trend
    Arctic fox
    Alopex lagopus
    population structure
    phenotypic trend
    conformation trait
    genetic trend
    fox
    Źródło:
    Journal of Applied Genetics; 2000, 41, 2; 113-122
    1234-1983
    Pojawia się w:
    Journal of Applied Genetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of laser beams on the variability of traits in spring barley
    Autorzy:
    Rybinski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/24451.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    variability
    yield structure
    chlorophyll mutant
    laser
    barley
    biostimulation effect
    genetic change
    mutation
    mutant
    spring barley
    Hordeum vulgare
    plant
    Źródło:
    International Agrophysics; 2000, 14, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The mRNA sequence polymorphisms of flowering key genes in bolting sensitive or tolerant sugar beet genotypes
    Autorzy:
    Alimirzaee, M.
    Mirzaie-Asl, A.
    Abdollahi, M.R.
    Kolaei, H.E.
    Fasahat, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/79841.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    sugar-beet
    Beta vulgaris ssp.maritima
    mRNA
    polymorphism
    flowering
    single nucleotide polymorphism
    genetic control
    RNA extraction
    protein structure prediction
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2017, 98, 3
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial structure of a natural mixed topodeme of subalpine Sorbus taxa
    Autorzy:
    Gomory, D
    Krajmerova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/59154.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    spatial structure
    genetic variation
    Sorbus
    subalpine plant
    apomixis
    microsatellite
    dispersal
    hybrid
    Sorbus chamaemespilus
    Sorbus aria
    Sorbus aucuparia
    reproductive system
    Opis:
    Spatial distribution and genetic variation of a population of Sorbus chamaemespilus (L.) Crantz and putative hybrids between S. chamaemespilus, S. aria and S. aucuparia growing in the nature reserve Skalnä Alpa (central Slovakia) were studied. The analysis of spatial patterns using Ripley's K-function revealed a significant clustering of the adults of both S. chamaemespilus and hybrid taxa at distances up to ~15 m and a strong affinity between both taxonomical groups, indicating similar ecological requirements. Bivariate point-pattern analysis considering cardinal direction showed that juvenile individuals of S. chamaemespilus are clustered around the adults up to the distance of ~2 m, whereas in hybrid taxa with larger and more dense crowns, juveniles are clustered at distances more than ~3 m from the adults. The analysis of genetic variation in a subset of adult shrubs using 4 nuclear microsatellite loci revealed that unlike expected, there was no variation in S. chamaemespilus but several genotypes were found in the group of hybrid taxa. Implications for the reproduction system and conservation of the investigated taxa are discussed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 4; 305-311
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Balance of cost, time, and quality related to construction projects regarding the reinforced concrete of underground structures using a meta-heuristic algorithm
    Bilans kosztów, czasu i jakości w odniesieniu do projektów budowlanych dotyczących betonu zbrojonego w konstrukcjach podziemnych z wykorzystaniem algorytmu meta-heurystycznego
    Autorzy:
    Hosseini, S. A.
    Akbarpour, A.
    Ahmadi, H.
    Aminnejad, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/230342.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    konstrukcja podziemna
    konstrukcja żelbetowa
    zarządzanie projektem
    bilans
    koszt
    czas
    jakość
    algorytm metaheurystyczny
    algorytm genetyczny
    underground structure
    reinforced concrete structure
    project management
    balance
    cost
    time
    quality
    metaheuristic algorithm
    genetic algorithm
    Opis:
    Underground spaces having features such as stability, resistance, and being undetected can play a key role in reducing vulnerability by relocating infrastructures and manpower. In recent years, the competitive business environment and limited resources have mostly focused on the importance of project management in order to achieve its objectives. In this research, in order to find the best balance among cost, time, and quality related to construction projects using reinforced concrete in underground structures, a multi-objective mathematical model is proposed. Several executive approaches have been considered for project activities and these approaches are analyzed via several factors. It is assumed that cost, time, and quality of activities in every defined approach can vary between compact and normal values, and the goal is to find the best execution for activities, achieving minimum cost and the maximum quality for the project. To solve the proposed multi-objective model, the genetic algorithm NSGA-II is used.
    Pomysł stworzenia bezpiecznej przestrzeni ma na celu zmniejszenie lub wyeliminowanie skutków zniszczenia i promieniowania, ze względu na bombardowanie klasyczne lub jądrowe i inne ataki. W przypadku ataków lotniczych zwykle używa się bomb z ogromnym potencjałem wybuchu i siłą niszczycielską, a zatem zderzenie tych bomb z celami powstaje bardzo wysoki poziom energii kinetycznej. Ta energia kinetyczna rozchodzi się jako ciśnienie i ciepło w środowisku, co może zakłócić i zniszczyć cel. Czasem ochrona przed bombardowaniami w budynkach i obiektach jest zapewniona przez modernizację zapobiegającą bezpośredniemu uderzeniu. Odbywa się to w przypadku ważnych miejsc, takich jak stanowiska dowodzenia i kluczowe elementy infrastruktury. Jednakże, w innych przypadkach, jest to nieuzasadnione z ekonomicznego punktu widzenia, dlatego też zamiast tego często wykorzystuje się podziemne lub częściowo podziemne bezpieczne przestrzenie (Movahedinia [5]). Zarządzanie projektem to zorganizowany system służący do zarządzania zasobami, dzięki czemu projekt może być ukończony zgodnie z określoną wizją w zakresie jakości, czasu i kosztu (Burke [7]). Projekty budowlane, podobnie jak inne działania i projekty, posiadają swoje własne ograniczenia. W odniesieniu do zarządzania projektem, są to tradycyjnie ograniczenia zakresu, czasu i kosztu. Te trzy czynniki są również określane jako trójkąt zarządzania projektem, w którym każde ograniczenie określa jedną stronę trójkąta. Podobnie jak w geometrii, jeśli jedna strona ulegnie zmianie, inne strony również się zmieniają; w zarządzaniu projektem, zmiany jednego czynnika wpływają również na inne czynniki. Trójkąt zarządzania projektem można również stosować w relacjach czasu, kosztu i jakości (Clements i Gido [8]). Oznacza to, że każdy projekt posiada trzy ograniczenia, którymi są czas, koszt i zakres. Ogólnie rzecz biorąc, kwestia równoważenia kosztu, czasu i jakości jednocześnie stara się uwzględnić trzy ważne czynniki w zarządzaniu projektem. Łatwo zrozumieć, że kwestia ta ma charakter wieloczynnościowy i może być przedstawiana w postaci modeli o wielu celach (Shuquan i Kongguo [11]). Struktura takiego modelu zawiera wiele opcji dla każdego działania, a model próbuje wybrać te z minimalnym koszem i czasem oraz najwyższą maksymalną jakością, lecz w tym przypadku mamy do czynienia z równoważeniem selekcji, ponieważ wysoka jakość i szybkość mają swoją cenę, a wykonanie kosztownego projektu może nie być możliwe. Badanie to ma na celu modelowanie problemu równoważenia kosztu, czasu i jakości w formie problemu o wielu celach, a następnie jego rozwiązanie za pomocą meta-heurystycznych algorytmów.
    Źródło:
    Archives of Civil Engineering; 2017, 63, 4; 103-121
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genotypic Population Structure of Ascochyta Pinodes and Phoma Pinodella in Poland
    Autorzy:
    Furgał-Węgrzycka, Helena
    Węgrzycki, Michał
    Powiązania:
    https://bibliotekanauki.pl/articles/2199175.pdf
    Data publikacji:
    2009-06-21
    Wydawca:
    Instytut Hodowli i Aklimatyzacji Roślin
    Tematy:
    Mycosphaerella (Didymella) pinodes anamorph Ascochyta pinodes
    Phoma pinodella (teleomorph Didymella)
    genotypic population structure
    components the genetic variation of population
    VCG frequency
    spatial and temporal VCG diversity
    Opis:
    The genotypic populations structure of Ascochyta pinodes and Phoma pinodella was de ter mined across a hierarchy of spatial and temporal scale by using vegetative in compatibility system as phenotypic genetic marker. Components of genetic variation within and be tween populations included the following values: in dices of diversity H’, richness (g), indices of evenness E1, E2 and E5, spatio-temporal analysis of genotypic variation (HT and HS val ues), pairwise comparisons of geno type diversity, distribution of VCGs across spatio-temporal scale (GST value) and analysis of variance calculated on VCGs ge no type frequencies within populations... 
    Źródło:
    Plant Breeding and Seed Science; 2009, 59; 21-52
    1429-3862
    2083-599X
    Pojawia się w:
    Plant Breeding and Seed Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie algorytmu genetycznego w procesie identyfikacji parametrów modeli reologicznych
    Application of genetic algorithm in the process of identification of rheological model parameters
    Autorzy:
    Rutczyńska-Wdowiak, K.
    Zbiciak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/310759.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    algorytm genetyczny
    struktury reologiczne
    materiał inżynierski
    modelowanie fenomenologiczne
    model Burgersa
    model Hueta-Sayegha
    mieszanki mineralno-asfaltowe (MMA)
    genetic algorithm
    rheological structure
    material engineering
    phenomenological modeling
    Burgers model
    Huet-Sayegh model
    hot mix asphalt (HMA)
    Opis:
    W artykule omówiono zagadnienie identyfikacji parametrów liniowych struktur reologicznych modelujących zachowanie się próbek MMA. W procesie identyfikacji wykorzystano algorytm genetyczny. Analizie poddano dwie struktury lepkosprężyste: klasyczny model Burgersa i model Hueta-Sayegha opisywany pochodną ułamkowego rzędu. Podano podstawy teoretyczne interpretacji badań doświadczalnych cyklicznego odkształcania próbek MMA. Opisano wybrane problemy implementacji algorytmu genetycznego. Otrzymane wyniki identyfikacji świadczą o poprawności działania algorytmu i potwierdzają przydatność tej techniki w zagadnieniach identyfikacji parametrów struktur reologicznych.
    The paper discusses the identification problem for parameters of linear rheological models representing the behaviour of asphalt-aggregate mixtures. Genetic algorithm technique is used for this purpose. Two viscoelastic models are considered: the classical Burgers model and the Huet-Sayegh model described by fractional derivatives. Theoretical basis of interpretation of experimental cyclic deformation of asphalt-aggregate samples is given. Selected problems of implementation of the genetic algorithm are discussed. The results of identification put the evidence of the correctness of the algorithm and confirm the usefulness of this technique in the identification process of rheological model parameters.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 12; 1658-1661
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Algorytmy hybrydowe optymalizacji w zastosowaniu do problemu sterowania systemami dystrybucji wody
    Hybrid optimization algorithm for control of water distribution systems
    Autorzy:
    Trawicki, D.
    Urbowska, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/153958.pdf
    Data publikacji:
    2007
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    systemy dystrybucji wody
    zintegrowane sterowanie ilością i jakością
    sterowanie optymalne
    hierarchiczna struktura sterowania
    sterowanie predykcyjne
    algorytmy genetyczne
    programowanie całkowitoliczbowe
    water distribution systems
    integrated water quantity and quality
    optimal control
    hierarchical control structure
    genetic algorithms
    mixed-integer programming
    Opis:
    W pracy analizowany jest problem optymalizującego zintegrowanego sterowania ilością i jakością w systemach dystrybucji wody. Proponowane decyzje i sterowania powinny zapewniać optymalizację przyjętego wskaźnika jakości, przy spełnieniu ograniczeń właściwych tej klasie systemów. Ostatecznie do rozwiązania złożonych zadań optymalizacji dynamicznej zaproponowane zostało podejście hybrydowe, wspomagające predykcyjne algorytmy sterowania i wykorzystujące zalety analizowanych w pracy algorytmów: algorytmu bazującego na metodzie podziałów i ograniczeń oraz algorytmów genetycznych.
    In this paper an approach to optimizing integrated control of quantity and quality in water distribution systems is presented. The optimizing integrated control meets consumer demand for drinking-quality water and maintains constraints while minimizing the operating costs. In predictive control 24 hours demand prediction and mathematical model of the water distribution system is used. The structure of basic control consists of two layers. To optimizing control at the upper layer hybrid algorithm is used. This algorithm is a combination of branch and bound algorithm and genetic algorithm, presented as well in this paper.
    Źródło:
    Pomiary Automatyka Kontrola; 2007, R. 53, nr 4, 4; 17-20
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Atopic eczema: genetics or environment?
    Autorzy:
    Wuthrich, B
    Cozzio, A.
    Roll, A.
    Senti, G.
    Kundig, T.
    Schmid-Grendelmeier, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/49593.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Medycyny Wsi
    Tematy:
    inflammatory skin disease
    environmental factor
    food
    atopy patch test
    non-atopic eczema
    Staphylococcus aureus
    contact allergen
    chronic disease
    human disease
    genetic condition
    therapy
    Malassezia sympodialis
    skin disease
    immunological deviation
    atopic eczema
    skin structure
    skin infection
    skin barrier
    Opis:
    Atopic eczema (AE) is a multifactorial skin disease caused by a variety of factors such as genetic conditions, alterated skin structure, immunologic deviations and environmental factors, among others. There are two main subtypes of AE, i.e. the IgE-associated (“atopic eczema”) and the non-IgE-associated type (“nonatopic eczema”) with different prognosis concerning the development of respiratory diseases (“atopy march”). Recently, it was demonstrated that Filaggrin (= fi lament-aggregating protein, FL) is a major gene for atopic eczema. Filaggrin binds to and aggregates the keratin cytoskeleton in the epidermis. Homozygous FLG mutation leads to complete loss of fi laggrin expression in skin. Half or more of children with moderate to severe AE carry FLG mutations. Moreover, fi laggrin loss-of-function mutations predispose to phenotypes involved in the atopy march. The altered skin structure and a defi ciency in antimicrobial peptides favour colonization with Staphylococcus aureus and yeasts (Malassezia sp.). Sensitization to the yeast occurs almost exclusively in AE patients. S. aureus enterotoxins with superantigenic activity stimulate activation of T cells and macrophages. So far, AE skin lesions are orchestrated by the local tissue expression of proinfl ammatory cytokines and chemokines with activation of T lymphocytes, dendritic cells, macrophages, keratinocytes, mast cells, and eosinophils which lead to the skin infl ammatory responses. From the therapeutic point of view, besides emollients and local corticosteroids, topic immunomodulatory drugs (tacrolimus and pimecrolimus) have substantially improved the treatment of AE.
    Źródło:
    Annals of Agricultural and Environmental Medicine; 2007, 14, 2
    1232-1966
    Pojawia się w:
    Annals of Agricultural and Environmental Medicine
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-44 z 44

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