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    Wyświetlanie 1-3 z 3
    Tytuł:
    Czy na plantacjach nasiennych zawężamy zmienność genetyczną? Próba odpowiedzi na podstawie analiz mikrosatelitarnego DNA szczepów rosnących na plantacji nasiennej sosny zwyczajnej (Pinus sylvestris L.) z Nadleśnictwa Susz
    Are we narrowing genetic variability in seed orchards? An attempt to answer, based on the analysis of microsatellite DNA of grafts growing in Scots pine (Pinus sylvestris L.) seed orchard in the Forest District Susz
    Autorzy:
    Przybylski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1311426.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    hodowla lasu
    plantacje nasienne
    sosna zwyczajna
    Pinus sylvestris
    zmiennosc genetyczna
    DNA mikrosatelitarny
    analiza DNA
    microsatellite DNA
    tree breeding
    seed orchard
    Opis:
    Scots pine (Pinus sylvestris L.) is the most common species in Poland’s forest stands. The mode of pine stands renovation requires that silviculture practitioners have continuous access to seed banks. Orchard-grown seeds are predicted to constitute an increasingly larger part of the average demand for pine seeds in Poland. Seed orchards, due to a limited number of maternal trees as well as the irregularity of their blooming and pollination, enhance the risk of genetic diversity reduction in planted forest stands. This is of particular importance in the context of dynamic climate change. Markers based on microsatellite DNA fragments are effective tools for monitoring genetic variability. In the present study, three different microsatellite DNA fragments were used: SPAC 12.5, SPAG 7.14 and SPAC 11.4. The main objective of this research was to study genetic variability in one of the biggest seed orchards in Poland, located in the Forest District Susz. The obtained results indicated heterozygosity loss within the orchard, proving the existence of specimen selection effects on genetic variability. Hence, it seems quite important to take account of molecular genetic variability of maternal trees in future breeding strategies.
    Źródło:
    Leśne Prace Badawcze; 2015, 76, 3; 240-249
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmienność taborskiej sosny zwyczajnej (Pinus sylvestris L.) z Nadleśnictwa Miłomłyn wyrażona w analizie cech morfologii igieł oraz polimorfizmie mikrosatelitarnego DNA
    Variability of Scots pine (Pinus sylvestris L.) called Taborz pine (Forest District Milomlyn) expressed in analysis of morphology of needle traits and polymorphism of microsatellite DNA
    Autorzy:
    Lesiczka, P.
    Pawlaczyk, E.M.
    Łabiszak, B.
    Urbaniak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292493.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    Nadlesnictwo Milomlyn
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    zmiennosc
    sosna taborska
    igly sosny
    cechy morfologiczne
    DNA mikrosatelitarny
    polimorfizm genetyczny
    markery molekularne
    genom jadrowy
    genom chloroplastowy
    Scots pine from Tabórz
    needle morphology
    nuclear (nrSSR) and chloroplast (cpSSR) microsatellite DNA
    genetic
    variation
    Opis:
    Scots pine (Pinus sylvestris L.) is one of the most widespread forest trees in the world, ranging from southern Mediterranean mountains to eastern Siberia. 30 trees of Scots pine from the Miłomłyn Forest District were analyzed in terms of 7 nuclear and 8 chloroplast microsatellite DNA loci as well as 7 morphological needle traits. Nuclear microsatellites (Simple Sequence Repeats) have proved to be useful in studying phylogeographic and gene flow patterns in conifers and are being used to infer the demographic history of tree species. A population’s genetic diversity, in fact, represents an important criterion which could be applied in planning future forest management and breeding. Additionally, many elements of Scots pine morphology, including needle traits, are subject to environmental modification. However, the adaptability of those traits remains, to some extent, under genetic control. The trees we investigated here are called Tabórz pine located in the northeast of Poland. This population is described as one of the best in Poland and even in Europe regarding bio mass production, ductility and wood quality. The aim of the study was to determine variation and genetic structure within this population. An analysis of phenotypic differentiation showed that the traits which differed the most between individuals were needle length, the number of serrations per 2 mm of needle length along the right edge and the number of stomatal rows on the convex side of the needles. In Tabórz pine, we detected 30 different genotypes with 87 alleles as well as 28 haplotypes with 30 alleles. We also revealed a slight excess of homozygotes, but the population is still in Hardy-Weinberg equilibrium. The Scots pine population from Tabórz furthermore showed a higher level of genetic diversity compared to stands from other Polish and European regions. This diversity may be the main factor impacting on the population’s wood quality and its breeding value.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zróżnicowanie fenotypowe i zmienność tła genetycznego polskich proweniencji sosny zwyczajnej
    Phenotypic differentiation and genetic background variation of Polish provenances of Pinus sylvestris L.
    Autorzy:
    Hebda, A.
    Skrzyszewski, J.
    Wachowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/987201.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewa lesne
    sosna zwyczajna
    Pinus sylvestris
    proweniencje krajowe
    zmiennosc fenotypowa
    zmiennosc genetyczna
    markery mikrosatelitarne
    DNA mikrosatelitarny
    polimorfizm loci
    zmiennosc adaptacyjna
    scots pine
    phenotypic differentiation
    neutral variation
    microsatellite markers
    environment correlation
    local adaptation
    Opis:
    We looked at the patterns of differentiation at a set of phenotypic traits of Scots pine populations derived from different environmental conditions of the species distribution range in Poland. The growth traits were tested over 47 years at the provenance trial experiment in the Carpathians. The phenotypic differentiation of the populations was compared to diversity estimates at a set of ten nuclear microsatellite markers. Scots pine populations were highly differentiated concerning diameter at breast high, stand volume, stem straightness and crown width according to the prove− nance and climatic zones. At the same time a low genetic diversity for microsatellite markers and no evidence of population structure was found among proveniences. Local populations from the Carpathian Mountains had lower genetic variation and weaker growth compared to lowland provenances. Among the tested populations Scots pine from lowlands were characterized by the great growth potential and good adaptation to the severe climate of the Carpathians. Populations that showed high quantitative traits differentiation were genetically homogenous at the neutral loci. The results indicate that there are some regions in the genome under selection that drive species adaptive variation.
    Źródło:
    Sylwan; 2017, 161, 04; 277-286
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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