Location and mapping of an autosomal recessive mutation causing unique phenotypic change in Drosophila bipectinata

In Drosophila bipectinata, flies with bilateral outgrowths on thorax were detected in sepia eye colour mutant stock. Such thoracic outgrowths have not been reported earlier in any species of Drosophila and appear to be unique phenotypic change in D. bipectinata caused due to autosomal recessive mutation. By using a double recessive mutant stock (se og) and a wild type stock, crosses were made and on the basis of recombination data of F1 females, the og mutation was mapped on the second chromosome of D.bipectinata. Further, D. bipectinata exhibits spontaneous male recombination in low frequency.