Lack of reproductive isolation between the Western and Eastern phylogroups of the tench

0341022 - ÚŽFG 2011 RIV NL eng J - Journal Article
Lajbner, Zdeněk - Kohlmann, K. - Linhart, O. - Kotlík, Petr
Lack of reproductive isolation between the Western and Eastern phylogroups of the tench.
Reviews in Fish Biology and Fisheries. Roč. 2010, č. 3 (2010), s. 289-300. ISSN 0960-3166. E-ISSN 1573-5184
R&D Projects: GA MŠMT LC06073
Institutional research plan: CEZ:AV0Z50450515
Keywords : Tench * Phylogroups * Reproductive isolation
Subject RIV: EG - Zoology
Impact factor: 3.609, year: 2010

We conducted a population genetic test of an indication that two phylogroups of the tench, previously recognised by us, may represent distinct species. We analysed variation at introns of nuclear genes, microsatellites, allozymes and mitochondrial DNA in populations from two postglacial lakes within the contact zone in Germany. The test is based on the expectation that in the presence of strong barriers to reproduction, a hybrid population will show genome-wide associations among alleles and genotypes from each phylogroup even after hundreds of generations of interbreeding. In contrast to this expectation, no consistent significant deviations from linkage and Hardy-Weinberg equilibria were found. Samples from both lakes did show significant disequilibria but they were limited to individual loci and were not concordant between populations, and were not robust to the method used. The single consistent association can be attributed to physical linkage between two microsatellite loci.
Permanent Link: http://hdl.handle.net/11104/0184136