Chromosomal Polymorphism in Indian Natural Populations of Drosophila Melanogaster = Chromosomal Polymorphism in Indian Natural Populations of Drosophila Melanogaster

다국어 초록 (Multilingual Abstract)

Chromosomal polymorphism was studied in 28 natural populations and several laboratory stocks established from naturally impregnated females of Drosophila melanogster from India. The chromosomal analysis revealed the presence of 42 paracentric inversions; 3 in the X-chromosome, 13 in 2L, 11 in 2R, 7 in 3L and 8 in 3R. All the four types of inversions; common cosmopolitan (4), rare cosmopolitan (4), recurrent endemic (7) and unique endemic (27) were found. One pair of overlapping inversions (3R) and one pair of included inversions (2L) were also detected during the present study. Description of all 42 inversions, their location in chromosomes, microphotographs, break points and geographical distribution are given collectively in this study. The breakpoints of inversions are randomly distributed in all the chromosomal arms. All these findings are in agreement with previous reports from other countries and suggest that Indian populations of D. melanogaster are highly polymorphic chromosomally.