DIALLEL ANALYSIS OF TEMPERATURE PREFERENCE IN DROSOPHILA-IMMIGRANS

The genetic structure of temperature preference of D. immigrans was an alyzed by a 4x4 diallel cross. Preference for low temperature was domi nant to that for high temperature. Partition of the variance showed th at most of the variance was additive; the variance caused by dominance was small but significant, and non-additive, non-dominance variance w as not significant. Heritability of the temperature preference was 0.8 1. There may be a few genes involved in variation for temperature pref erence.