Comparative cytogenetics of two sympatric species (Gymnocypris, Schizothoracinae) from the Lake Langcuo, Qinghai-Tibet Plateau. Issue 3 (2nd July 2016) - Zhang, Renyi
Abstract: Schizothoracinae is a subfamily of naked carp which is widespread throughout the Qinghai-Tibet Plateau region. Cytogenetic analyses were performed on two sympatric species of naked carp, Gymnocypris chui and G. scleracanthus from the Lake Langcuo, Qinghai-Tibet Plateau. The results showed G. chui and G. scleracanthus had the same chromosome number (2 n = 92), but different karyotypes:, (36m + 16sm + 12st + 28a) for G. chui and (26m + 12sm + 18st + 36a) for G. scleracanthus, respectively. The six loci of 45S ribosomal genes (rDNA) were detected through fluorescent in situ hybridization, and their locations were highly conserved between two species. This study depicted the chromosomal characteristics of the Schizothoracinae species and improved our understanding about the relationships and the evolution of two sympatric species.