Inheritance of proportionate dwarfism in Angus cattle

Australian Veterinary Journal
M R LatterPeter A Windsor

Abstract

To determine the mode of inheritance of congenital proportionate dwarfism in Angus and Angus crossbred cattle, initially detected in two commercial beef herds in northern New South Wales. Matings of normal carrier sires to unrelated cows of diverse breeds, and of one carrier sire to his unaffected daughters. An unrelated Piedmontese bull was also mated to unaffected daughters of the carrier sires. Two carrier Angus bulls and nine unaffected daughters, all of whom were completely indistinguishable from normal animals, were purchased for controlled breeding studies under known nutritional and disease conditions. Affected and carrier individuals were examined for the presence of obvious chromosomal abnormalities. Angus dwarfism has been successfully reproduced under controlled experimental conditions over successive years using unrelated dams and is undoubtedly heritable. The high frequency of occurrence of affected individuals (23/61 = 0.38 +/- .06) among the progeny of matings of the Angus sires to unrelated females of diverse breeding is not compatible with recessive inheritance, because of the negligible frequency of proportionate dwarfism in the breeds of the dams. Both paternal and maternal transmission of the defect was dem...Continue Reading

References

May 1, 1979·The Journal of Heredity·K E Gregory, S L Spahr
Sep 1, 1991·Proceedings of the Society for Experimental Biology and Medicine·A C HammondT A Olson
Dec 1, 1993·Australian Veterinary Journal·P A Harper, M R Latter
Jun 1, 1995·Australian Veterinary Journal·P A HarperJ F Wilkins
May 14, 1998·Australian Veterinary Journal·P A HarperP A Gill

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Citations

Apr 3, 2016·Genetics, Selection, Evolution : GSE·Hermann SchwarzenbacherHubert Pausch
Dec 20, 2014·BMC Research Notes·Shermin de SilvaTennekoon V Pushpakumara
Dec 4, 2009·Biology of Reproduction·Christina Ramires FerreiraRalf Steinborn
May 2, 2017·Genes & Genomics·Aleksandra CiepłochEwa Poławska

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