The adjacent lncRNA:CR45722, lncRNA:CR45723 and lncRNA:CR43839 lncRNA genes have been knocked out and replaced with an attP-FRT-Disc\RFP3xP3.cUa-FRT reporter cassette.
Df(2L)CR45722-CR43839 homozygote males show severely reduced fertility compared to wild-type controls, display severe morphological defects in testes (accumulation of abnormal cotton-like flocculus in their distal part) and the sperm cells in their seminal vesicles are significantly smaller.
The investment cones of Df(2L)CR45722-CR43839 homozygous males are lagging and disorganized during the individualization step of spermatogenesis compared to wild-type.