Racial divergence in abdominal bristles among parental races and newly evolved cytoraces of <i>nasuta-albomicans </i>complex of <i>Drosophila</i>

Abstract

Cytoraces are the products of interracial hybridization between <i>Drosophila nasuta nasuta </i>and <i>D</i>. <i>nasuta albomicans. </i>These races differ from their parents in the chromosome composition, mating preference, certain<i> </i>fitness phenotypes and also a few morphophenotypic traits. Now, these cytoraces are passing through 330<i> </i>generations. Racial divergence in the 4^th and 5^th abdominal bristles among the parental races and the newly<i> </i>evolved cytorace 1 and 2 is reported. The results revealed that the parental races have more number of bristles<i> </i>than newly evolved cytoraces. Thus, these cytoraces are evolved/evolving with reduced abdominal bristle<i> </i>number and better fitness.