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    Wyświetlanie 1-3 z 3
    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:
    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:
    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
      Wyświetlanie 1-3 z 3

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