Construct: 18kb fragment carrying ovoD1.
Heat induced expression of P{ovoD1-18} P{FRT(whs)} chromosome using P{hsFLP} causes a dominant female sterile phenotype, no eggs are laid by heterozygous females, oogenesis is blocked before vitellogenesis. Heat induced expression of P{ovoD1-18} P{FRT(whs)} chromosome using P{hsFLP} allows 100% recovery of germline clones (GLC) (compare to 1-2% following X ray irradiation). Eggs are laid by females derived from germline recombination events.
Heterozygotes have pale orange eyes. One copy of P{ovoD1-18} causes atrophic ovaries, the few females with normal ovaries lay abnormal eggs that have fused dorsal appendages and are flaccid. Three copies causes sterility.
Chou.
10.5kb and 7.2kb fragments of ovoD1 were also carried in P-element but no transformants were recovered.