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Wyszukujesz frazę "population diversity" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Zróżnicowanie genetyczne wybranych populacji sosny zwyczajnej (Pinus sylvestris L.) na podstawie analiz RAPD
Genetic diversity of Scots pine (Pinus sylvestris L.) Polish provenances based on RAPD analysis
Autorzy:
Nowakowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/973034.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
drzewa leśne
leśnictwo
within− and among population genetic diversity
Scots pine
RAPD analysis
metoda RAPD
sosna zwyczajna
Pinus sylvestris
genetyka roślin
populacje roślin
zróżnicowanie genetyczne
Opis:
Genetic diversity is one of the key requirements for the adaptive potential of forest trees. This study presents the analysis of 30 Polish Scots pine provenances. According to the RAPD method, three 10−mer primers: OPE−08, OPE−09 and OPF−07 (Operon Technologies) were used to generate most polymorphic bands of amplified DNA among 450 individuals. The genetic similarity index was calculated after Nei (1987) matching coefficient and results were presented as dendrogram of genetic distances obtained from cluster analysis (UPGMA) for all populations. The Scots pine provenances were also characterized by height and diameter at the breast height „DBH” traits and were compared with the genetic diversity level. All studies populations were characterized by genetic diversity GST=0,215. This coefficient of inter−popu− lation variation was lower than the level of the differentiation within populations (HT=0,262), as it was reported for other Pine species. The results from these studies may be useful to the forest practice to help with decisions on the establishment of stable forest stands; they are also used in the forest genetic resources conservation programmes.
Źródło:
Sylwan; 2003, 147, 11; 26-37
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zróżnicowanie genetyczne populacji Heterobasidion annosum sensu stricto i Heterobasidion parviporum w wybranych drzewostanach sosnowych i świerkowych w Polsce
Genetic diversity of Heterobasidion annosum sensu stricto and Heterobasidion parviporum in chosen Scots pine and Norway spruce stands in Poland
Autorzy:
Łakomy, P.
Kwaśna, H.
Cieślak, R.
Molińska-Glura, M.
Dalke-Świderska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1006483.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
fitopatologia lesna
drzewostany swierkowe
drzewostany sosnowe
choroby roslin
huba korzeni
Heterobasidion annosum
Heterobasidion parviporum
rozprzestrzenianie sie grzybow
genotyp
zroznicowanie genetyczne
heterobasidion spp.
genetic diversity
pathogen population
Opis:
The study was done in five Scots pine and five Norway spruce stands. Pine stands were infested by Heterobasidion annosum sensu stricto and spruce stands by Heterobasidion parviporum. In all stands the pathogens’ genets were identified. In Scots pine stands 54 genets were found. The biggest one covered area of 160,2 m² and was isolated from 11 stumps. 40% of genets were isolated only from one stump, but in some cases two or three genets colonized the same stump. In Norway spruce stands 55 genets were found. In most cases they were small and only two covered area of 38,5 m² and 40 m². The other ones colonized only one stump or more genets were found in the same stump. Genetic diversity among genets varied from 0 to 77%.
Źródło:
Sylwan; 2012, 156, 04; 270-279
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zmienność proweniencyjna olszy czarnej w Polsce
Provenance variability of black alder in Poland
Autorzy:
Rożkowski, R.
Mejnartowicz, L.
Guzicka, M.
Dorobek, K.
Chmura, D.J.
Powiązania:
https://bibliotekanauki.pl/articles/979576.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
lesnictwo
drzewa lesne
olsza czarna
Alnus glutinosa
proweniencje
wysokosc drzew
piersnice drzew
piersnicowe pole przekroju
miazszosc drzew
zmiennosc proweniencyjna
alnus glutinosa
diameter
diversity
height
population
productivity
stem straightness
Opis:
European black alder (Alnus glutinosa (L.) Gaertn.) is a widespread tree species associated with wetlands and riparian ecosystems, thus it plays an important ecological role. Due to its fast growth and favorable wood properties it also has a potential to satisfy a growing demand for wood and fiber. However, its growth potential is not fully realized in Poland. In this study we investigated variation in growth traits, productivity, and stem straightness among 11 populations of European black alder originating from the lowland distribution of the species in Poland. The common−garden experiment located in 1968 in Kórnik (mid−western Poland) has been so far the only provenance experiment with this species in our country. We measured height and diameter of all trees at the site, assessed stem straightness in a 5−step scale (1−crooked; 5−straight), and calculated productivity at age of 50 years, which should be considered close to the rotation age. We found significant variation among populations in all investigated traits. The difference in productivity between the best and the worst provenance reached 75%. Using published and unpublished data from previous measurements at this site we also analyzed a trend in provenance ranking through time. The best and worst provenance could be identified at age 16 years, but many ranking shifts took place afterwards at the intermediate rank positions. We conclude that growth, productivity and stem quality of black alder could be improved through selection of favorable provenances within the species. Selection decisions can be made at the age below the half the rotation age, although decisions at 3/4 of rotation age would be more precise.
Źródło:
Sylwan; 2019, 163, 10; 830-838
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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