Figure 5. Diapause incidences in allelic combinations of two of the five genes of BC females of Drosophila triauraria.

“homo,” homozygous for alleles from the non-diapause strain; “hetero,” heterozygous for those from the diapause and non-diapause strains. In the cases of per, Clk, and cyc (rows 1, 3, and 4), the blue and red lines almost overlap in each graph, indicating that there was no allelic effect on diapause incidence. In the cases of tim and cry (rows 2 and 5), the blue lines are always higher than the red lines in each graph, indicating that there is an effect of allelic differences on diapause incidence; furthermore, the blue and red lines are completely parallel in the combination of tim and cry, indicating that there is no interaction effect between them. These effects were confirmed by the statistical analysis.