Assessing the putative roles of X-autosome and X-Y interactions in hybrid male sterility of the Drosophila bipectinata species complex.
Interspecific F1 hybrid males of the Drosophila bipectinata species complex are sterile, while females are fertile, following Haldane's rule. A backcross scheme involving a single recessive visible marker on the X chromosome has been used to assess the putative roles of X-autosome and X-Y interactions in hybrid male sterility in the D. bipectinata species complex. The results suggest that X-Y interactions are playing the major role in hybrid male sterility in the crosses D. bipectinata x D. parabipectinata and D. bipectinata x D. pseudoananassae, while X-autosome interactions are largely involved in hybrid male sterility in the crosses D. malerkotliana x D. bipectinata and D. malerkotliana x D. parabipectinata. However, by using this single marker it is not possible to rule out the involvement of autosome-autosome interactions in hybrid male sterility. These findings also lend further support to the phylogenetic relationships among 4 species of the D. bipectinata complex.
Mishra
Paras Kumar
PK
Genetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, India.
Singh
Bashisth Narayan
BN
D000818:Animals; D003433:Crosses, Genetic; D004330:Drosophila / Q000235:genetics* / Q000502:physiology; D005260:Female; D005298:Fertility / Q000235:genetics; D006824:Hybridization, Genetic; D008297:Male; D008957:Models, Genetic; D013045:Species Specificity; D014960:X Chromosome; D014998:Y Chromosome