Hsp8319F2/Hsp83e6A females have a series of ovarian defects. Approximately 75% of egg chambers are blocked at different developmental stages, not later than stage 9. The remaining egg chambers show a pronounced defect in the transfer of nurse cell cytoplasm to the oocyte; the nuclei of the nurse cells do not degenerate at the end of the dumping process, as occurs in wild-type egg chambers, but persist up to later stages of oogenesis. Mutant mature eggs are smaller in size than normal and have altered dorsal appendages.
Hsp8319F2 has no effect on an invariant bristle trait (thoracic and scutellar bristles were analysed). Hsp8319F2 has no significant effect on the trait mean of a variable bristle trait (the sternopleural, orbital, ocellar and vibrissa and carina bristles were analysed) compared to the background strain in which the Hsp8319F2 mutation was induced.