Chromosome observations based on C-banding, Ag-NOR and sequence-specific staining in two Anax species from India (Odonata: Aeshnidae)

摘要

The previously known male karyotypes (2n = 27, m; n = 14, m; X0 sex determination) of Anax immaculifrons and A. nigrofasciatus nigrolineatus from Himachal Pradesh are re described, based on conventional staining and are described for the first time using three other staining techniques. In the two species, C-bands occur on chiasmatic/non-chiasmatic bivalent ends, there is a C-positive X, while them bivalent is C-negative in A. irnmaculifrons and C-positive in A. nigrofasciatus. The other details are given in the text and micrographs are provided.