Abstract
Summary - Following the discovery of the 1/29 chromosome translocation in Swedish artificial insemination (AI) bulls, cytogenetic evaluation of South African AI bulls was initiated. The present paper reports on the 269 bulls screened over the past 11 yr. The 1/29 chromosome translocation was found in Brahman and Brown Swiss bulls while chimerism was present in the Friesian bulls. The overall incidence of chromosome abnormalities in these bulls is 1.49%. Although the incidence is low, discovery of the abnormalities serves to illustrate the importance of cytogenetic screening in the AI industry. cattle / chromosome abnormality / translocation / chimerism
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