title: Duration of meiosis and spermiogenesis in the dog.
abstract: The duration of meiosis and spermiogenesis was studied in the dog by following the kinetics of [3H]thymidine-labeled canine spermatocytes autoradiographically. Leptotene appears to last for at least 4.20 days, zygotene for less than a day, and pachytene for about 15.50 days. The transition from diplotene to metaphase II is extremely rapid and requires approximately a day. The duration of spermiogenesis is at least 19.60 days. Both meiosis and spermiogenesis are completed by 42.15 days.
mesh_terms: D000818:Animals; D001001:Anura; D010856:Columbidae; D006224:Cricetinae; D004285:Dogs / Q000502:physiology*; D005399:Fishes; D006736:Horses; D006801:Humans; D008297:Male; D008540:Meiosis; D051379:Mice; D013045:Species Specificity; D013091:Spermatogenesis; D013997:Time Factors