China Dairy ›› 2021, Vol. 0 ›› Issue (9): 120-124.doi: 10.12377/1671-4393.21.09.22

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Genotyping on β-caseins of Jiulong Tibetan Yellow Cattle and Jiulong Yak

ZHAO Mengbo, JIN Suyu, HUANG Lin, ZHENG Yucai   

  1. College of Animal and Veterinary Sciences,Southwest Minzu University,Chengdu Sichuan 610041
  • Online:2021-09-25 Published:2021-09-29

Abstract: The β-casein (β-CN) variants were identified in Jiulong Tibetan Yellow cattle and Jiulong yak by acid urea polyacrylamide gel electrophoresis. The results indicated that four alleles, including A1, A2, B and C, were detected in β-CN of Jiulong Tibetan Yellow cattle and Jiulong yak. There were 7 genotypes in Jiulong Tibetan yellow cattle: A1A1, A1A2, BB, A1B, A2B, A1C and BC, the dominant allele was A1 (the frequency was 0.702 4), and the dominant genotype was A1A1 (the frequency was 0.547 6). There were two genotypes in Jiulong yak: A1A2 and A2A2, and the dominant allele was A2 (the frequency was 0.7647). This study showed that the β-CN polymorphisms were found in both Jiulong Tibetan yellow cattle and Jiulong yak, but the dominant alleles were significantly different.

Key words: Tibetan yellow cattle, Yak, β-casein, acid urea electrophoresis, genotype

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