Prevalence of the 14/20 centric fusion chromosomal aberration in US Simmental cattle.
Cytogenetic evaluation was made on 353 Simmental cattle (166 male, 187 female) from 113 herds in 26 states. One hundred thirty-eight (39%) were found to be heterozygous-positive for the 14/20 centric fusion chromosomal translocation, including 41 (25%) males and 97 (52%) females. One submitted heparinized blood sample from a Simbrah bull was found to be positive for 14/20 and 1/29 centric fusions. Sampling, which was based on requests, was highly selective. Thus, the 39% prevalence found was not representative of 14/20 centric fusion in the national Simmental breed. On the basis of our findings, cytogenetic evaluation of breeding stock was consistent with modern management practice.
Weber
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Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Minnesota, St Paul 55108.
Buoen
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LC
Zhang
T
T
Ruth
G R
GR
D000818:Animals; D001947:Breeding; D002417:Cattle / Q000235:genetics*; D002418:Cattle Diseases / Q000235:genetics*; D002503:Centromere; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D005260:Female; D005306:Fertilization / Q000235:genetics; D006579:Heterozygote; D007246:Infertility / Q000453:epidemiology / Q000235:genetics / Q000662:veterinary*; D007315:Insemination, Artificial / Q000662:veterinary; D008297:Male; D015995:Prevalence; D014178:Translocation, Genetic; D014481:United States / Q000453:epidemiology