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Wyszukujesz frazę "Krajmerová, D." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    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:
    Lack of signals of selection at candidate loci at a small geographical scale along a steep altitudinal gradient in Norway spruce (Picea abies [L.] Karst.)
    Autorzy:
    Hrivnak, M.
    Krajmerova, D.
    Gomory, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2117886.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    local adaptation
    single nucleotide polymorphisms
    FST-outliers
    spatial analysis method
    Opis:
    Local adaptation is a key concept in biology: shift of genetic structures of populations due to differential survival of genotypes is expected to lead to phenotypes providing an advantage in the local environment. Variation of sequences of twelve candidate genes was investigated in 13 Norway spruce (Picea abies (L.) Karst.) provenances originating from sites distributed along an altitudinal gradient from 550 to 1300 m a.s.l. Signals of selection were assessed in 103 single nucleotide polymorphisms (SNP). The Bayesian FST-outlier identification methods as implemented in the programs BayeScan and Arlequin did not identify any SNP with a clear evidence of selection. The approaches relying on SNP-climate associations (spatial analysis method based on logistic regression of allele frequencies with environmental variables, Bayesian method applied in BayEnv2) identified several relationships but none of them remained significant after correction for multiple testing. Gene flow, epigenetic inheritance and former management of the studied populations are discussed as potential reasons for this weak evidence of selec- tion signals.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 43-51
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of provenance transfer on the growth and survival of Picea abies provenances
    Autorzy:
    Krajmerova, D
    Longauer, R.
    Pacalaj, M.
    Gomory, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/41447.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    international conference
    Europe
    forest ecosystem
    plant breeding
    tree
    Norway spruce
    Picea abies
    provenance experiment
    global warming
    adaptation
    growth
    survival
    Opis:
    Two provenance experiments with Norway spruce in Slovakia were used to reveal trends in the behaviour of provenances after their transfer. Regressions between the average height and survival of provenances and the differences between the geographic and selected climatic characteristics of the place of origin and provenance plots were significant for most of the characteristics tested. Data from the experiment with Polish and Slovak provenances from 1972 indicated that transfer into warmer regions with a longer vegetation period results in improved height growth and survival, with the exception of survival at initial stages. The experiment from 1964 with a broader altitudinal range of provenance plots, but with unadjusted latest measurements at individual plots available, revealed the best height growth of Slovak Norway spruce provenances after their transfer to sites with the mean annual temperature approximately 1°C higher and with the vegetation period 12 days longer than at places of origin. Transfer into lower altitudes, a warmer climate and a longer vegetation period improved survival. In both experiments, transfer to areas with increased rainfall had a negative effect on growth, which is probably associated with the fact that provenances are not able to exploit additional precipitation for the growth in areas with a colder climate and a shorter vegetation period.
    Źródło:
    Dendrobiology; 2009, 61 Supplement
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interspecific differentiation and gene exchange among the Slovak Quercus sect. Quercus populations
    Autorzy:
    Mačejovský, V.
    Schmidtová, J.
    Hrivnák, M.
    Krajmerová, D.
    Sarvašová, I.
    Gömöry, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077650.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    white oaks
    differentiation
    gene admixture
    divergent selection
    species cohesion
    Opis:
    European white oak species (Quercus sect. Quercus) are known to share a substantial part of their nuclear and cytoplasmic genomes as a result of extensive interspecific hybridization and introgression. We studied natural populations of three species distributed in Slovakia, namely Q. robur, Q. petraea and Q. pubes- cens, which are largely sympatric but have contrasting ecological requirements, using a combination of leaf morphometry, neutral nuclear microsatellite markers (nSSR) and potentially adaptive amplified fragment length polymorphisms (AFLP). Bayesian analysis of population structure relying on nSSR revealed that the degree of admixture was relatively low in Q. robur but higher in Q. petraea and Q. pubescens. The inferred Q. robur ancestry closely correlated with morphometric scores of the canonical discriminant analysis based on 13 leaf traits, while for the other two species the correlation was much weaker. We identified two AFLP fragments associated with climatic variables, mainly with air vapour pressure and characteristics of temper- ature regime at the sites of origin. These associations indicate that climatic adaptation is the mechanism driving interspecific divergence and maintaining integrity of white oak species.
    Źródło:
    Dendrobiology; 2020, 83; 20-29
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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