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Wyszukujesz frazę "Lewandowski, J." wg kryterium: Autor


Wyświetlanie 1-5 z 5
Tytuł:
Zmiennosc genetyczna sosny zwyczajnej [Pinus sylvestris L.] na klonowej plantacji nasiennej w Gniewkowie
Autorzy:
Burczyk, J.
Dzialuk, A.
Lewandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/824801.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
zmiennosc genetyczna
hodowla lasu
izoenzymy
sosna zwyczajna
lesnictwo
Pinus sylvestris
drzewa lesne
Źródło:
Sylwan; 2000, 144, 07; 65-74
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybór elitarnych drzew matecznych sosny zwyczajnej i modrzewia europejskiego do założenia plantacji nasiennych 1,5 generacji
Selection of elite plus trees of Scots pine and European larch for the establishment of 1.5 generation seed orchards
Autorzy:
Lewandowski, A.
Kowalczyk, J.
Litkowiec, M.
Urbaniak, L.
Rzońca, M.
Powiązania:
https://bibliotekanauki.pl/articles/988981.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
plantacje nasienne
zakladanie plantacji
wybor drzew matecznych
drzewa elitarne
sosna zwyczajna
Pinus sylvestris
modrzew europejski
Larix decidua
seed orchards
genetic gain
forest tree breeding
Opis:
Forest tree breeding is principally concerned with the improvement of growth, wood quality and vitality of tree species of economic interest. In Poland, breeding programs started in the second half of the twentieth century with the choice of plus trees to establish seed orchards. At present, seed orchards are a predominant source for the production of genetically improved seeds of conifers. In our country, Scots pine is the main forest tree, occupying almost 80% of the forest area. Annually, about 30,000 hectares of pines are artificially planted, with only a few percent of seeds coming from seed orchards. European larch is an important admixture tree species of economic significance in some areas, such as the Świętokrzyskie Mountains. Unlike Scots pine, as much as 60% of larch seeds used for artificial regeneration comes from seed orchards. There are 179 seed orchards in Poland, occupying area of 1140 ha, including 48 Scots pine and 30 European larch ones of 384 ha and 207 ha, respectively. All of them are only first generation and were established with vegetative propagules of plus trees selected in wild stands for their outstanding phenotype. Based on the results from the evaluation of plus trees in progeny trials, we selected 40 Scots pine and 40 European larch elite trees to establish 1.5−generation seed orchards. The selected trees were also characterized for their level of genetic variation with the use of nuclear microsatellite loci. We found that the examined trees have a high level of genetic variation. The mean number of alleles per locus and expected heterozygosity were 12.4 and 11.9, and 0.752 and 0.806, for Scots pine and European larch respectively. The calculated parameters are comparable to that observed in the populations of these species in Poland and other European countries. Established genetic profiles will be used in the future for controlling and monitoring the identity of elite trees in the process of creating archives of clones and seed plantations of next generation.
Źródło:
Sylwan; 2017, 161, 11; 917-926
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Określenie pochodzenia wyłączonych drzewostanów nasiennych sosny rychtalskiej (Pinus sylvestris L.) z wykorzystaniem markerów mikrosatelitarnych
Determination of the origin of the rychtal Scots pine (Pinus sylvestris L.) seed tree stands using microsatellite markers
Autorzy:
Wójkiewicz, B.
Żukowska, W.B.
Urbaniak, L.
Kowalczyk, J.
Litkowiec, M.
Lewandowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/985719.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
hodowla lasu
sosna zwyczajna
Pinus sylvestris
sosna rychtalska
drzewostany nasienne
pochodzenie roslin
zmiennosc genetyczna
analiza DNA
markery mikrosatelitarne
scots pine
genetic variation
gene pool
genetic structure
ssr markers
Opis:
The rychtal pine is one of the most valuable ecotypes of Scots pine (Pinus sylvestris L.) approved for the breeding purposes in Poland. However, it occupies stands typical for oaks and beeches as shown by the compatibility analysis of species composition in relation to the habitat type in which they occur. Such result raises some doubts in terms of the naturalness of the rychtal pine and calls its history and origin into question. In the present study, we used the set of nuclear microsatellite markers to characterize and compare the gene pool composition of the selected seed tree stands of the rychtal pine with 200−year−old pine trees which grow at the Syców Forest District (SW Poland). We aimed to know to what extent the set of alleles specified for the group of the oldest trees from natural habitats is represented in the younger forest tree stands of the rychtal pine. The analysis of molecular variance (AMOVA) and clustering analysis showed that the gene pool of the studied pine populations was homogenous (FST=0,02%, K=1). The parameters of genetic variation were similar for all populations except for the mean number of alleles. On average, 25 new alleles were found in two rychtal pine seed tree stands as compared to the set of alleles found in the group of old pine trees. However, all alleles defined for old pines were also present in the gene pool of younger rychtal pine forest stands. The differences in the gene pool richness result most likely from quite high differences in the number of individuals analyzed from each population. In conclusion, our results indicate the common origin of the studied Scots pine populations.
Źródło:
Sylwan; 2019, 163, 08; 637-644
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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