Genetics architecture of male sterility and segregation distortion in Drosophila pseudoobscura Bogota - USA hybrids. (sciencenews.org)
Using targeted mutagenesis in mouse models, deletion of the gene encoding RARα (Rara) yielded male sterility with defects in spermatogenesis that resembled VAD testes (5 — 7), including a failure of sperm alignment and release into the tubular lumen. (academic.oup.com)
Late generation PARP -2-deficient mice display male sterility associated with meiosis 1 abnormalities and defect in spermiogenesis (cmbn.no)