Chromosomal polymorphism in Indian populations of Drosophila bipectinata Duda.

Drosophila bipectinata, a member of the melanogaster species group, is a common and wide-spread species in the Indian subcontinent. A geographic survey of inversion polymorphism has been carried out in Indian populations. Altogether, nine paracentric inversions are detected in the populations examined during this study. Of the nine inversions, two have been described earlier by Bock from laboratory populations established from Borneo, Thailand and the Philippines. The possible relationship between inversions and different environmental conditions is discussed.