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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2004;17(11): 1479-1483.
DOI: https://doi.org/10.5713/ajas.2004.1479    Published online November 1, 2004.
Genetic Polymorphism of Milk Protein and Their Relationships with Milking Traits in Chinese Yak
Y. J. Mao, G. H. Zhong, Y. C. Zheng, X. W. Pen, Z. P. Yang, Y. Wang, M. F. Jiang
Milk protein polymorphisms were genotyped by polyacrylamide gel electrophoresis (PAGE) from 109 Maiwa and 100 Jiulong yaks. The relationships between milk protein polymorphisms and 3 milking traits were studied. The results showed that ??CN竊뚳겓-CN and ??La were monomorphic, and ??s1-CN and ??Lg were polymorphic, with ??s1-CN D and ??Lg E as dominant genes, respectively. The frequencies of ??s1-CN D were 0.8073 and 0.6000 in two populations and ??Lg E were 0.9770 and 0.9700. The mean heterozygosities were 0.1021 and 0.1867 in the two populations. No significant effects on milking traits and milk protein compositions were observed except for ??s1-CN locus on fat percentage in Jiulong yak.
Keywords: Milk Protein; Genetic Polymorphisms; PAGE; Milking Traits; Yak

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