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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 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:
Comparison of phenotypic and genetic selections in Scots pine (Pinus sylvestris L.) single tree plot half-sib progeny tests
Autorzy:
Kowalczyk, J
Powiązania:
https://bibliotekanauki.pl/articles/41778.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Scotch pine
Pinus sylvestris
genetic selection
phenotypic selection
selection index
heritability
genetic gain
genetic diversity
progeny test
statistical method
Opis:
The study was carried out in three Scots pine (Pinus sylvestris L.) single tree plot half-sib progeny tests planted in 1984–86. Phenotypic selection was done in two ways: F about 0.5% to 1% of the total number of trees were chosen by the author on the basis of their appearance only, and Fbis on the basis of diameters at breast height and heights measurements and observations scored for individual trees. The best trees were selected on the basis of the index value weighing traits by their economic value. Genetic selection was performed based on both family index value (Wf) and tree index value (WT), weighing traits by heritability and economic value. This was done in four different ways: (A) The best trees were selected only on the basis of their index value (WT) with no attention paid to the family; (B) About 10 to 12 trees were selected in the best families, (both (Wf) and (WT) were taken into consideration); (C) The best 30% of the families (Wf) were selected and then equal numbers of best trees were selected (WT); (D) The same number families (Wf) as in the phenotypic selection were selected and within these families equal numbers of best trees (WT). The number of trees that were genetically selected was always the same as the number of phenotypically selected ones (selection type F). The selections were compared using a calculated expected genetic gain and the relative loss of effective population size. As expected, phenotypic selection resulted in the lowest genetic gain. Phenotypic selection generally conserved genetic variability, while genetic selection reduced it, especially when genetic gain was maximised. Phenotypic selection type F generally identifies the good families. The agreement of genetic selection with the phenotypic selection is low (0% to 19%) at the individual tree level. This is slightly better with phenotypic selections using measurements data (Fbis). Phenotypic selection is recommended only where information concerning pedigrees is not available. It can provide a simple and cheap way of obtaining material for future selection. Genetic selection method (A) where best trees were selected without any restrictions provided highest genetic gain and cause the greatest loss of genetic diversity.
Źródło:
Dendrobiology; 2005, 53; 45-56
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evidence for RNA recombination between distinct isolates of Pepino mosaic virus
Autorzy:
Hasiów-Jaroszewska, Beata
Kuzniar, Arnold
Peters, Sander
Leunissen, Jack
Pospieszny, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1040390.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
genetic diversity
recombination
PepMV
Opis:
Genetic recombination plays an important role in the evolution of virus genomes. In this study we analyzed publicly available genomic sequences of Pepino mosaic virus (PepMV) for recombination events using several bioinformatics tools. The genome-wide analyses not only confirm the presence of previously found recombination events in PepMV but also provide the first evidence for double recombinant origin of the US2 isolate.
Źródło:
Acta Biochimica Polonica; 2010, 57, 3; 385-388
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New hardware engine for new operating systems
Autorzy:
Ahmadi, N.
Kaveh, M.
Powiązania:
https://bibliotekanauki.pl/articles/11375.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
hardware engine
new system
operating system
genetic algorithm
chromosome
genetic diversity
problem solution
Opis:
Genetic algorithm is a soft computing method that works on set of solutions. These solutions are called chromosome and the best one is the absolute solution of the problem. The main problem of this algorithm is that after passing through some generations, it may be produced some chromosomes that had been produced in some generations ago that causes reducing the convergence speed. From another respective, most of the genetic algorithms are implemented in software and less works have been done on hardware implementation. Our work implements genetic algorithm in hardware that doesn’t produce chromosome that have been produced in previous generations. In this work, most of genetic operators are implemented without producing iterative chromosomes and genetic diversity is preserved. Genetic diversity causes that not only don’t this algorithm converge to local optimum but also reaching to global optimum. Without any doubts, proposed approach is so faster than software implementations. Evaluation results also show the proposed approach is faster than hardware ones.
Źródło:
International Letters of Natural Sciences; 2013, 05
2300-9675
Pojawia się w:
International Letters of Natural Sciences
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:
Full length genome sequence of Polish isolate of Beet soil-borne virus confirms low level of genetic diversity
Autorzy:
Borodynko, Natasza
Hasiów-Jaroszewska, Beata
Rymelska, Natalia
Pospieszny, Henryk
Powiązania:
https://bibliotekanauki.pl/articles/1040498.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
BSBV
genetic diversity
Polymyxa betae
Opis:
The complete nucleotide sequence of a Polish isolate of Beet soil-borne virus was determined for the first time. The genome organization was identical with those previously established for isolates from Germany and China. A comparison of the Polish isolate with others deposited in GenBank reveled high level of nucleotide identity, about 98-100%, throughout the genome analyzed. The ratio between non-synonymous and synonymous substitutions was rather low suggesting a negative selective pressure. The non-synonymous mutations were particulary frequent in triple gene block.
Źródło:
Acta Biochimica Polonica; 2009, 56, 4; 729-731
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity of the Salix lapponum L. population intended as a source of material for reintroduction
Autorzy:
Głębocka, Katarzyna
Pogorzelec, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/956821.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
reintroduction
genetic diversity
salix lapponum
Opis:
Salix lapponum is a relict species that occurs in peat bogs. The most numerous population in Poland, which is located on Lake Bikcze, was selected as a source of plant material for genetic analysis to check if it could be used to translocate and establish new populations in the future. For this purpose, the genetic variability of five groups of plants, which were located 50 to 130 m away from one another, was assessed using the AFLP method. GenoType software did not indicate clonal individuals in the studied population. Although the groups were located at short distances from one another, the genetic differentiation between them, expressed as ΦPT and GST coefficients, was very high and the clustering methods adopted showed the presence of genetic structure. The lack of correlation between geographic distance and pair-wise ΦPT indicated that at least in the past the gene flow was fluent, but nowadays seedling recruitment is barely visible. These results can be explained by the fact that from the beginning of the 21st century the Lake Bikcze population has dramatically decreased in size. On the other hand, the expected heterozygosity in each group is quite high. If we want to use this population as a donor of reproductive material, action should be taken as quickly as possible.
Źródło:
Dendrobiology; 2017, 78; 136-145
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of RAPD, ISSR and SSR markers in assessing genetic diversity among rye*(Secale cereale L.) inbred lines
Autorzy:
Myśków, Beata
Milczarski, Paweł
Masojc, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2199589.pdf
Data publikacji:
2010-12-01
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
dendrogram
genetic diversity
molecular markers
rye
Opis:
Forty eight inbred lines of winter rye, of various origin and pedigree, were analysed using 19 RAPD (random amplified polymorphic DNA) primers, 8 ISSR (inter-simple sequence repeats) primers and 13 SSR (simple sequence repeats) primer pairs. On the basis of particular marker types, there were created three separate dendrograms and one combined similarity tree, prepared on account of the whole data. Correlation coefficients for individual technique based on genetic similarity matrices were not significant. By comparing the GS data obtained on the basis of singular methods with collective matrix, it was observed that the highest correlation rate was for ISSR method (r=0.68). The utility of each marker technique was compared by using marker index MI. Diversity detecting index (DDI) was suggested in the paper, which may prove helpful in planning and comparing researches on phenetic relationships...
Źródło:
Plant Breeding and Seed Science; 2010, 62; 107-116
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variation of several bread wheat (Triticum aestivum L.) genotypes based on some morphological traits
Zróżnicowanie genetyczne kilku genotypów pszenicy zwyczajnej (Triticum aestivum L.) na podstawie niektórych cech morfologicznych
Autorzy:
Sabaghnia, N.
Janmohammadi, M.
Bashiri, A.
Asghari-Shirghan, R.
Powiązania:
https://bibliotekanauki.pl/articles/11236605.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
plant genetics
genetic variation
bread wheat
wheat
Triticum aestivum
genotype
morphological trait
genetic diversity
cluster analysis
Źródło:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura; 2014, 69, 1; 44-54
0365-1118
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska. Sectio E. Agricultura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic similarity of chosen Syringa species determined by the ISSR-PCR technique
Autorzy:
Rzepka-Plevnes, D
Smolik, M.
Tanska, K.
Powiązania:
https://bibliotekanauki.pl/articles/41611.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Przelewice Dendrological Garden
genetic variability
Syringa
lilac
genetic diversity
taxonomy
ISSR technique
polymerase chain reaction
Opis:
Inter-simple sequence repeat (ISSR) amplification was used to analyze polymorphism of microsatellite sequences in the lilacs genom and to evaluate genetic diversity among seven lilacs species (Syringa × prestoniae McKelvey., S. reflexa K.C. Schneid., S. villosa Vahl, S. × chinensis Willd., S. meyeri K.C.Schneid., S. vulgaris L.and S. reticulata (Blume) var. amurensis (Rupr.)). The plant material was originated from the collection of Dendrological Garden in Przelewice.A total of 30 primers, containing different simple sequence repeat motifs were tested for amplification.Out of the 30 primers only 13 gave interpretable banding patterns in all lilacs species.A total of 182 ISSR fragments were generated with 13 primers of which 109 (60%) were polymorphic and 57 (31.2%) species-specific. ISSR–PCR with genomic DNAs of the showed lilacs yielded DNA fragmets ranging form 2200 to 123 bp in size.Species-specific ISSR fragments were detected for each lilacs accessions.UPGMA cluster analysis was used to construct a dendrogram and to estimate the genetic distances between lilacs species.The ISSR-based phylogeny was generally consistent with Syringa taxonomy based on morphological and phenological evidence.
Źródło:
Dendrobiology; 2006, 56; 61-67
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity and mating system of Scots pine plus trees
Autorzy:
Wasielewska, M
Klemm, M.
Burczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/41784.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
Scotch pine
Pinus sylvestris
genetic diversity
mating system
genetic variation
plus tree
plant quality
tree
Opis:
We have investigated genetic diversity and the mating system of Scots pine plus trees from the Tuchola Forests – Poland, using allozymes as genetic markers. The studied plus trees possess high genetic diversity (expected heterozygosity He = 0.427) and low inbreeding (Wright’s index F = –0.028), which is comparable to Scots pine trees observed in other studies in natural populations and seed orchards. The mating system analyses revealed that almost all offspring produced by the plus trees were due to outcrossing (tm = 0.983), with no apparent bi-parental inbreeding. The estimate of correlation of paternity indicated that each of mother trees is pollinated on average by a relatively large number of effective males (Nep = 30.3). The observed genetic diversity and mating system patterns indicate that the seeds produced by the studied plus trees possess high genetic variation needed in reforestation processes.
Źródło:
Dendrobiology; 2005, 53; 57-62
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic analysis of silver-fir populations in the North Carpathian and Sudeten Mountains
Autorzy:
Mejnartowicz, L
Powiązania:
https://bibliotekanauki.pl/articles/56903.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Abies alba
genetic distance
silver fir
isoenzyme
Carpathians Mountains
botany
heterozygosity
genetic diversity
Sudetes Mountains
Opis:
Seeds collected from individual trees in the 16 Carpathian and 2 Sudeten silver-fir (Abies alba) populations were studied with the starch gel electrophoresis in megagametophytes using 14 enzyme systems with 28 loci. The results show that the geographical distance between populations are in a small part reflected in genetic distances. There are two main groups of populations: Sudeten and Carpathian with a very big genetic distance between them. Other populations consist of a few small groups with low gene flow between them (Nm = 3.286). About 80% of genetic variation is located within populations (FST = 0.223). Average values for genetic multiplicity and diversity for Carpathian populations are as follows: number of alleles per locus: Na = 2.308, with effective number of alleles Ne = 1.552 and proportion of polymorphic loci 71.21%. The mean number of alleles per locus (Na) varied from 2.107 to 2.607 in population. The mean effective number of alleles per locus (Ne) ranged from 1.429 to 1.662. Average Fis for Carpathian populations was -0.021, which means that there is small excess of heterozygotes. The average observed heterozygosity amounted to Ho = 0.275 and expected heterozygosity was He = 0.269. The dendrogram structure and presence of rare alleles found in silver-fir of Czech, and Slovakian populations allow for a hypothesis that in postglaciation the silver-fir moved into the Polish Carpathians not westward from the east but from the south along river valleys from some Balkan refuges, getting North bypassing the High Tatra Range. This way, a highly diversified set of populations originated, differ in the presence of rare alleles. This differentiation is not prevented by a relatively small flow of genes between populations. The calculated gene flow Nm = 3.286 also indicates isolation between the populations. It means 3.3 immigrants per generation into the studied populations.
Źródło:
Acta Societatis Botanicorum Poloniae; 2004, 73, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic diversity and differentiation of coexisting populations of Quercus robur L.and Q. petraea (Matt.) Liebl.
Autorzy:
Sandurska, E.
Ulaszewski, B.
Burczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/2117873.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
nature reserve
genetic diversity
genetic differentiation
species identification
effective
population size
Quercus petraea
Q. robur
Opis:
Pedunculate and sessile oaks (Quercus robur L.; Q. petraea [Matt] Liebl.) often coexist in mixed forest stands. However, species-specific investigations and forest management actions in such populations require reliable methods of identification of the species status of individuals. We investigated genetic diversity and species dif- ferentiation of adult and naturally established seedling cohorts in a mixed forest stand composed of Q. robur and Q. petraea, located in the Jamy Nature Reserve in north-central Poland. Using nineteen nuclear microsatellite loci and a model-based clustering approach as a tool for species delineation, we efficiently identified 105 and 60 adults, as well as 191 and 456 seedlings of pedunculate and sessile oaks, respectively. While the adult trees of both species were randomly distributed throughout the sample plot, the seedlings demonstrated significant spatial clustering, which was particularly evident for Q. petraea. The two oak species exhibited similar levels of genetic diversity in adult and offspring cohorts. Inbreeding was found to be low and significant only at the stage of seedlings. The estimates of effective population size were higher for Q. robur than Q. petraea, despite the overall greater reproductive success of the later one. There was a significant level of differentiation between the studied oak species, as measured by Fst coefficient (0.084 – adults; 0.099 – seedlings). The results on genetic diversity and species differentiation obtained in the studied indigenous near-natural stand of Q. robur and Q. petraea could be considered as a reference for other population genetic studies of oaks.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 17-28
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genetic variability of Colobanthus quitensis from King George Island (Antarctica)
Autorzy:
Giełwanowska, Irena
Androsiuk, Piotr
Chwedorzewska, Katarzyna
Szandar, Kamil
Powiązania:
https://bibliotekanauki.pl/articles/2049620.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctic
Colobanthus quitensis
genetic diversity
iPBS
Źródło:
Polish Polar Research; 2015, 3; 281-295
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 96

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