This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Logue, D. N. Articles by Harvey, M. J. A. Search for Related Content PubMed Articles by Logue, D. N. Articles by Harvey, M. J. A.

Meiosis and spermatogenesis in bulls heterozygous for a presumptive 1/29 Robertsonian translocation

Summary. Bulls heterozygous for the 1/29 Robertsonian translocation showed normal mating behaviour, semen quality and spermatogenesis. The karyotypes of 90 offspring of one heterozygous bull were consistent with a normal 1:1 segregation of the translocation. There was no difference in overall chiasma frequency at diakinesis between heterozygous and normal bulls, and while a trivalent was noted at diakinesis the chiasma position within the No. 1 arm of the trivalent did not appear to be altered when compared with that found in the normal No. 1 bivalent. An increased frequency of aneuploid secondary spermatocytes at the second meiotic division (M II) was found in the heterozygous bulls, the rate of non-disjunction based on the proportion of hypermodal cells being raised from 2·8% in the normal to 6·4% in the heterozygous animals.

This article has been cited by other articles:

				Q. Zhang, D. Boichard, I. Hoeschele, C. Ernst, A. Eggen, B. Murkve, M. Pfister-Genskow, L. A. Witte, F. E. Grignola, P. Uimari, et al. Mapping Quantitative Trait Loci for Milk Production and Health of Dairy Cattle in a Large Outbred Pedigree Genetics, August 1, 1998; 149(4): 1959 - 1973. [Abstract] [Full Text] [PDF]