抄録
Genetic variation of regulatory genes with respect to the amylase activities in different developmental stages (developmental inducibility) as well as the inducibility (S/N) which was studied in the previous reports (Yamazaki and Matsuo 1984), was found among 10 isogenic strains established from a natural population of Drosophila melanogaster. Net fitness of each of these 10 strains was obtained from interspecific competition experiments and the correlation between fitness and inducibilities of amylase was calculated; No correlation was obtained between developmental inducibility and fitness. On the other hand, a significant positive correlation was obtained between fitness and inducibility (S/N) (γp=0.48* and γg=0.95). This indicates that these two types of regulatory gene polymorphisms are different in nature, and that regulatory patterns of the enzymes which are found in different developmental stages under normal environments have little to do with adaptability of flies.
