Taxon composition and genetic variation of water frogs in the Mid-Rhône floodplain.
C R Acad Sci III
; 320(9): 759-66, 1997 Sep.
Article
em En
| MEDLINE
| ID: mdl-9377180
ABSTRACT
Natural hemiclonal hybrid lineages of water frogs reproduce by hybridogenesis, excluding one parental genome in the germ line and mating with the coexisting same parental species. Two such sexual host-hybridogen systems occur in the Rhône valley the L-E system in the north, the P-G system in the south. Although these hybridogenetic complexes may overlap along the Rhône river, there is no evidence for a contact zone in our samples only Rana ridibunda and R. esculenta were identified using protein electrophoresis. Whether the absence of R. perezi reflects a more southern distribution or its exclusive occurrence in other habitats, remains to be tested. Comparison of somatic and gonadal tissues reveals that gametogenesis of R. esculenta is of the L-E type gametes carry ridibunda genomes. R. ridibunda apparently is not native, but was introduced by humans, and the R. esculenta in our samples is probably an immigrant from nearby L-E systems.
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Base de dados:
MEDLINE
Assunto principal:
Rana esculenta
/
Rana ridibunda
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article