Comparative morphological and genetic analysis of populations and species of the genus Daphnia O.F. Müller, 1785 (Crustacea; Daphniidae) from Lake Glubokoe and Lake Chany

Resumo

The results of analysis of the variability of body shape of different Daphnia galeata morphs from geographically distinct populations—Lake Glubokoe (Moscow oblast) and Lake Chany (Novosibirsk oblast) are given. The morphological analysis was combined with the analysis of the variability of fragments of the 16S and 12S genes of the mitochondrial DNA (mtDNA) and the internal transcribed spacer 2 (ITS2) of the nuclear DNA. A reconstruction of the phylogenetic relationships between species of the genus Daphnia has been performed using a combined fragment of the 16S and 12S genes of the mtDNA. An inconsistency in the distribution of the 12S- and ITS2-haplotypes for the species D. galeata has been revealed, which indicates the introgression of mtDNA in the Lake Chany population.