Karyological Analysis of Two Species in the Subfamily Schizothoracinae (Cypriniformes: Cyprinidae) from China, with Notes on Karyotype Evolution in Schizothoracinae

摘要

The karyotypes of Schizothorax kozlovi and S. lissolabiatus in the Subfamily Schizothoracinae, both of which are endemic to China, were investigated for the first time using the methods of kidney cell culture in vivo, and the numbers, sizes and morphology of the chromosomes in the two species were expatiated. The karyotype formula of S. kozlovi could be stated as 2n = 92 = 18M + 14SM + 16ST + 44T, FN = 124, and that of S. lissolabiatus might be described as 2n = 148 = 44M + 36SM + 20ST + 48T, FN = 228. S. kozlovi was probably a tetraploid species while S. lissolabiatus should be a hexaploid one, both these two species should belong to the primitive group in Schizothoracinae.