[article]
| Titre : |
Genetic structure of rare Epipactis atrorubens populations from two National Parks in Northeast Poland |
| Type de document : |
texte imprimé |
| Auteurs : |
Emilia Brzosko, Auteur ; Ada Wroblewska (Wróblewska, Ada), Auteur |
| Année de publication : |
2006 |
| Article en page(s) : |
pp. 71-80 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] Pologne
[Espèces (in biblio)] Epipactis atrorubens
|
| Mots-clés : |
diversité génétique |
| Résumé : |
"Four Epipactis atrorubens (Hoffm.) Besser populations from Biebrza and Wigry National Parks were analyzed by starch gel electrophoresis to measure genetic and genotypic diversity. A total of 22 loci were analyzed, of which only two were polymorphic for the species. All populations had low levels of genetic variation (mean proportion of polymorphic loci, P = 9.09%; mean number of alleles per locus, A = 1.12; average observed heterozygosity, H o = 0.037). However, a considerable overabundance of homozygotes within the Wigry populations was detected (F IS = 0.081–0.415); in one Biebrza population only an excess of heterozygotes was observed (F IS = −0.299). Genotypic diversity within E. atrorubens populations from the two regions was also relatively low. Only seventeen multilocus genotypes were identified among 441 samples taken from all populations. The proportion of distinguishable genotypes (0.12) and Simpson's diversity index (0.79) also indicated that the populations consisted of a few, more or less abundant genets. Genetic differentiation of populations between Biebrza and Wigry was high (F ST = 0.265). Population substructuring (ca 1–6 km) was found at a small spatial scale among the Wigry populations, which were only moderately differentiated (F ST = 0.071), suggesting either that there is substantial gene flow between populations or that they have not been isolated long enough for the effects of genetic drift to be detectable." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Brzosko E., Wroblewska A., 2006 - Genetic structure of rare Epipactis atrorubens populations from two National Parks in Northeast Poland. Polish Botanical Journal, 22 : 71-80. |
| ID PMB : |
69079 |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69079 |
in Polish Botanical Journal > vol. 22 (Année 2006) . - pp. 71-80
[article]
|
Genetic structure of rare Epipactis atrorubens populations from two National Parks in Northeast Poland in Polish Botanical Journal, vol. 22 (Année 2006)