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Real-time PCR genotyping and frequency of the myostatin F94L mutation in beef cattle breeds

Published online by Cambridge University Press:  27 November 2009

D. M. Vankan ,
D. R. Waine  and
M. R. S. Fortes
D. M. Vankan*
Affiliation:
Animal Genetics Laboratory, School of Veterinary Science, The University of Queensland, Brisbane 4072, Australia
D. R. Waine
Affiliation:
Animal Genetics Laboratory, School of Veterinary Science, The University of Queensland, Brisbane 4072, Australia
M. R. S. Fortes
Affiliation:
Animal Genetics Laboratory, School of Veterinary Science, The University of Queensland, Brisbane 4072, Australia
*
†E-mail: [email protected]
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Abstract

This research developed two real-time PCR assays, employing high-resolution melt and allele-specific analysis to accurately genotype the F94L mutation in cattle. This mutation (g.433C > A) in the growth differentiation factor 8 or myostatin gene has recently been shown to be functionally associated with increased muscle mass and carcass yield in cattle. The F94L mutation is not, like other myostatin mutations, associated with reduced fertility and dystocia. It is therefore a candidate for introgression into other breeds to improve retail beef yield and the development of a simple and accurate test to genotype this specific mutation is warranted. Variations in the efficiency of enzyme cleavage compromised the accuracy of genotyping by published methods, potentially resulting in an overestimation of the frequency of the mutant allele. The frequency of the F94L mutation was determined by real-time PCR in 1140 animals from 15 breeds of cattle in Australia. The mutation was present in Simmental (0.8%), Piedmontese (2%), Droughtmaster (4%) and Limousin (94.2%) but not found in Salers, Angus, Poll Hereford, Hereford, Gelbvieh, Charolais, Jersey, Brahman, Holstein, Shorthorn or Maine Anjou. The low prevalence of F94L in all beef breeds except Limousin indicates the significant potential for this mutation to improve retail yield in Australian beef cattle.

Keywords

beef cattleF94Lmarker-assisted selectionmyostatinreal-time PCR
Type
Full Paper
Information
animal , Volume 4 , Issue 4 , April 2010 , pp. 530 - 534
Copyright
Copyright © The Animal Consortium 2009

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