Abstract
Body weight of Drosophila ananassae at different developmental stages was measured under different nutritional and temperature conditions. Comparison of body weight was made among four different karyotypes, derived from a subterminal inversion In2L.
Body weight of inversion heterozygotes was significantly heavier than that of homozygotes throughout all developmental stages under most of the experimental conditions. Larval weight increment per hour was larger in heterozygotes than homozygotes, especially in earlier larval stages.
Heterozygote superiority was also true for nitrogen content, which was strongly correlated with body weight.
