Détail de la notice
Titre du Document
Comparison of allozyme variability in Polish populations of two species of Ptilidium Nees (Hepaticae) with contrasting degrees of sexual reproduction
Auteur(s)
ADAMCZAK Małgorzata ; BUCZKOWSKA Katarzyna ; BACZKIEWICZ Alina ; ...
Résumé
The genetic structure of 19 populations of two species of the genus Ptilidium - P. pulcherrimum and P. ciliare from Poland and Slovakia was studied. Nine putative loci in nine enzyme systems were resolved. Two loci (Got and Me) were monomorphic at the genus level. Both species were fixed for alternative alleles at three loci (Acp, Idh and Prx-A) that can be used as diagnostic markers for these two species. Both species proved to be polymorphic: P. ciliare for three (Gdh, Pgm and Sdh), and P. pulcherrimum for four loci (Gdh, Pgm, Sdh and Pgd). Gene diversity statistics show a lower total gene diversity (HT) of asexually reproducing P. ciliare (0.299 ′ 0.089) as compared to sexually reproducing P. pulcherrimum (0.379 ′ 0.044). The GSTin P. ciliare was 0.263, in P. pulcherrimum 0.374. In both species a relation between the allele numbers and allele frequencies with geographical regions was observed. Montane populations of P. ciliare displayed a lower number of alleles than the populations derived from the lowlands, whereas in P. pulcherrimum no genetic differentiation between both geographical regions was observed.
Editeur
Elsevier
Identifiant
ISSN : 1290-0796
Source
Cryptogamie. Bryologie A. 2005, vol. 26, n° 2, pp. 151-165 [15 pages]
Langue
Anglais
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