Private Alleles Evidence for a Refuge Area North of the Holdhaus Line

Private alleles are, from a population genetic point of view, of special interest. They developed either during the course of a long-lasting isolation of the respective population (i.e., the variant originates from mutation) or they originally occurred in many populations but were lost at all but one site, e.g., as a consequence of repeated extinction and recolonization (Hewitt 1996). These two sources of origin imply that private alleles occur predominantly in populations in or close to refuge areas.

Fig. 6 Numbers of private alleles in C. auronitens samples investigated at four allozyme loci. Groups of samples are indicated by a single circle only (compare Fig. 2), private alleles for these groups are summed over the respective populations

Fig. 6 Numbers of private alleles in C. auronitens samples investigated at four allozyme loci. Groups of samples are indicated by a single circle only (compare Fig. 2), private alleles for these groups are summed over the respective populations

Altogether 24 private alleles were found in the C. auronitens populations, 14 in the populations from the Pyrenees and another three in the remaining samples from Southern France (Fig. 6). Additionally, seven private alleles occur in the region around the border triangle of Switzerland, France, and Germany (including the Vosges, the Black Forest, and part of the Swiss and French Jura). These findings suggest the existence of at least one other glacial refuge area in this region North of the Holdhaus line.

Was this article helpful?

0 0

Post a comment