title: Cytologic and ultrastructural evidence of spermatid selection in a 1/29, 14/20 centric fusion bull.
abstract: A crossbred bull heterozygous for a double centric fusion was produced. At 14 months of age, semen volume and sperm characteristics were normal. Cytologic and ultrastructural evidence of spermatid degeneration was found coincident with abundant, apparently normal, sperm formation. Implications for the early detection of centric fusion in young bulls are discussed.
authors.affiliation: Department of Veterinary Population Medicine and the Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St. Paul 55108, USA. weber009@umn.edu
authors.forename: Alvin F
authors.initials: AF
authors.lastname: Weber
authors.forename: James
authors.initials: J
authors.lastname: Waddell
authors.forename: Mel L
authors.initials: ML
authors.lastname: Fahning
authors.forename: Lance C
authors.initials: LC
authors.lastname: Buoen
authors.forename: Bradley E
authors.initials: BE
authors.lastname: Seguin
mesh_terms: D000818:Animals; D002417:Cattle / Q000235:genetics* / Q000502:physiology; D003433:Crosses, Genetic; D008297:Male; D012661:Semen / Q000166:cytology; D013076:Sperm Count / Q000662:veterinary; D013091:Spermatogenesis / Q000502:physiology*; D013094:Spermatozoa / Q000502:physiology* / Q000648:ultrastructure*