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    Wyświetlanie 1-8 z 8
    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 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 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 variation of the relict and endangered population of Chamaedaphne calyculata (Ericaceae) in Poland
    Autorzy:
    Szczecinska, M
    Sawicki, J.
    Wasowicz, K.
    Holdynski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/41179.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    plant species
    rare species
    Polska
    endangered population
    relict population
    genetic variation
    Chamaedaphne calyculata
    Ericaceae
    genetic diversity
    conservation
    geographic distribution
    Opis:
    Chamaedaphne calyculata is rare and endangerded species of Polish flora. The genetic variation within and among ten polish population of leatherleaf was analysed by ISSR and ISJ markers. The analysis revealed a total of 160loci with an average of 13.3 bands per primer. We expected a low level of genetic diversity of this narrowly distributed species in Poland, but our results indicate that Ch. calyculata revealed a high level of genetic diversity at species level (P=88.7%of polymorphic loci, AE=1.468, HE=0.290). At the population level, the variation of Ch. calyculata was significantly lower (P=27.6%, AE=1.140, HE=0.098). There was significant correlation between ecological properties (population size; number of flowering ramets) and genetic diversity parameters. Analysis of molecular variance showed that most of variation (62%) in Ch. calyculata occurred among population. Gene flow (Nm) between the ten studied populations, determined based on the GST index, was very low at 0.239. It indicated that the fragmentation and isolation of populations might result from specific evolutionary history of this plant and postglacial recolonization
    Źródło:
    Dendrobiology; 2009, 62; 23-33
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low level of genetic variation within Melica transsilvanica populations from the Krakow-Czestochowa Upland and the Pieniny Mts revealed by AFLPs analysis
    Autorzy:
    Szczepaniak, M
    Cieslak, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/58779.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    low level
    genetic variation
    Melica transsilvanica
    plant population
    Krakow-Czestochowa Upland
    Pieniny Mountains
    AFLP technique
    Melica ciliata
    genetic diversity
    habitat fragmentation
    Opis:
    Fragmented distribution, the breeding system and effects of genetic drift in small-size populations occurring at edge of the species range play an important role in shaping genetic diversity of such a species. Melica transsilvanica is a plant rare in the flora of Poland, where it reaches the northern limit of its continuous range. Amplified Fragment Length Polymorphism (AFLP) DNA profiling method was applied to measure genetic diversity among and within populations of M. transsilvanica. Additionally, genetic relationships between M. transsilvanica and Melica ciliata, two closely related species, were explored. A total of 68 plants from 7 populations of M. transsilvanica and 24 plants from 2 populations of M. ciliata, collected in Poland and outside it, were analyzed. Using 294 AFLP fragments from 3 primer combinations, accessions were grouped into two major clusters associating with M. ciliata and M. transsilvanica, respectively. Further, two subclusters, corresponding to the samples collected from the Pieniny Mts and from the Kraków - Częstochowa Upland were clearly distinguished within the M. transsilvanica group. The hierarchical AMOVA exhibited significant genetic distinction between these geographic regions (60.89%, p < 0.001). The obtained results showed that the most genetic diversity resided between the populations of M. transsilvanica (86.03%) while considerably lower genetic variation was found within the populations (13.97%), which is consistent with the results reported for self-plants. The low level of AFLP genetic variation of M. transsilvanica can be caused by the geographic isolation of populations, which preserves the dominant self-mating breeding system of the species. Individual populations of M. transsilvanica are characterized by isolated gene pools differing by a small number of loci.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 4; 321-331
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic variation within and among naturally regenerating populations of alder [Alnus glutinosa]
    Autorzy:
    Mejnartowicz, L
    Powiązania:
    https://bibliotekanauki.pl/articles/56806.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    rare allele
    genetic distance
    isoenzyme
    Alnus incana
    genetic diversity
    European black alder
    gene flow
    beside grey alder
    naturally regenerating population
    heterozygosity
    botany
    alder
    genetic variation
    Alnus glutinosa
    Opis:
    To assess the inter- and intrapopulation genetic variation in the filial generation (F1) of alder (Alnus glutinosa (L.) Gaertn.), 11 naturally regenerated populations were analysed. Their parental populations (P), represent the whole Polish territory and belong to three phytosociological associations with alder: typical alder swamp forest Carici elongatae-Alnetum (Ce-A); alder riparian forest Circaeo-Alnetum (C-A); and ash-elm riparian forest Fraxino-Ulmetum (F-U). F1 populations are grown in a common-garden experiment (provenance trial). Genotyping of individual trees has been carried out by analysis in a bud tissue allele frequency in the 21 isozyme putative loci of 10 enzymes. Differences between populations in respect to the level of genetic diversity were not high. Genetic diversity measured as the number of effective alleles per locus was the highest (Ne = 1.65) in population Wińsko originating from F-U (where also the inbreeding coefficient was the highest, F = 0.429), and the lowest (Ne = 1.48) in population Sławki from Ce-A. In all investigated populations, observed heterozygosity (Ho = 20%) was lower than expected from H-W equilibrium (He = 29%). The highest genetic variation expressed as percentage of polymorphic loci (77.3%) was observed in the offspring populations from Ce-A, and the smallest (69.9%) in the populations originating from F-U. It seems that the low genetic differentiation between populations is probably connected with long-distance seed dispersal via river systems. Alder seed can be transported over long distances thanks to periodical flooding. There is some gene flow between alder populations, with about 2.5 immigrants successfully entering a population per generation (Nm = 2.55). The level of population subdivision within A. glutinosa was low (Fst = 0.089). There was no significant genetic differentiation between populations from different phytosociological associations. Mantel test exhibited no significant correlation (r = 0.077) between genetic and geographic distance. In the dendrogram constructed according to Nei (1972) on the basis of interpopulation genetic distances, many small groups can be observed.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geographic distribution of quantitative traits variation and genetic variability in natural populations of Pinus mugo in Central Europe
    Autorzy:
    Boratynska, K.
    Dzialuk, A.
    Lewandowski, A.
    Marcysiak, K.
    Jasinska, A.K.
    Sobierajska, K.
    Tomaszewski, D.
    Burczyk, J.
    Boratynski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/41495.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    geographic distribution
    quantitative trait
    variation
    genetic variability
    genetic diversity
    isoenzyme
    natural population
    Pinus mugo
    phenotypic diversity
    chloroplast
    microsatellite
    Central Europe
    Europe
    Opis:
    Divergence in genetic as well as phenotypic structures can be expected in species with disjunctive geographic ranges and restricted gene flow among isolated populations. Dwarf mountain pine has such a disjunctive geographic range in the mountains of Central Europe. We hypothesised that populations of Pinus mugo from the Giant Mts. differ from Alpine and Carpathian populations to a greater extent than differentiation within these regions; furthermore, these differences would be detectable at both the genetic and phenotypic levels. To verify this hypothesis, the diversity and differentiation within and among eleven populations from the Giant Mts., Carpathians and Alps were analysed using 19 isozyme isozyme loci, 17 needle and 15 cone morphological characters. Moreover, the data on 10 chloroplast microsatellites used in the previous study, were reanalysed. The differences between the three regions were greater than among populations within them. The microsatellites and isozymes clearly differentiated between regions, while in the multivariate analyses of cone and needle characters the Alpine and Carpathian populations were intermingled but distinct from those sampled in the Giant Mts. The significant genetic structuring among regions may result from an ancient fragmentation and long lasting geographic isolation between the Giant Mts., Alps and Tatras. The populations from the Giant Mts., the northernmost within the geographic range of P. mugo, presented lower level of genetic variation then those from the Alps and Carpathians. The pattern of genetic structure observed in dwarf mountain pine may be characteristic of wind-pollinated trees with a disjunctive geographic distribution
    Źródło:
    Dendrobiology; 2014, 72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geographical pattern of haplotypic variation in Austrian native stands of Picea abies
    Autorzy:
    Mengl, M
    Geburek, T.
    Schueler, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/41567.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    international conference
    Europe
    forest ecosystem
    plant breeding
    tree
    Norway spruce
    Picea abies
    mitochondrial DNA
    biogeography
    genetic diversity
    haplotypic variation
    native stand
    Austria
    tree species
    Opis:
    In the present study we analysed the mitochondrial intraspecific variation in natural populations of Norway spruce. We used the second intron of the nad1 gene, which contains two polymorphic short tandem repeats. Due to the maternal inheritance of mitochondrial DNA in Norway spruce, the spatial distribution of haplotype DNA allows insights into seed dispersal and artificial seed transfer. A total of 504 trees distributed all over Austria were genotyped, and 9 different haplotypes could be found. A geographical map of the haplotype variation pattern of Picea abies is presented.
    Źródło:
    Dendrobiology; 2009, 61 Supplement
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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