›› 2013, Vol. ›› Issue (5): 161-165.

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Study on the Polymorphisms of CAST Gene Exon 9 and its Effect on Backfat Thickness in Shanxi White Pig

ZHAO Xian-ping1, LI Wei2, WANG Yan-ling2, HE Xiao-li2, GAO Peng-fei2, Guo Xiao-hong2, LI Bu-gao2, CAO Guo-qing2   

  1. 1. School of Animal Husbandry and Veterinary Medicine of Shanxi Province, Taiyuan 030024, China;
    2. College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China
  • Received:2012-09-24 Online:2013-05-20 Published:2013-05-27

Abstract: A total of 416 pigs from Duroc, Large White, Landrace, Shanxi White, Shanxi Black and Mashen were used to detect the polymorphisms of calpastatin (CAST) gene exon 9 by PCR- SSCP. Five SNPs were detected in the amplified region, which were T37G, A150G, C167T, C193T, and C256T, of them, the mutations of C193T and C256T located in the CAST gene exon 9 were missense mutation, which gave rise to the changes from threonine to isoleucine and from threonine to methionine, respectively. Seven haplotypes of A, B, C, D, E, F and G were detected in the examined populations. The distributions of the haplotypes in different pig breeds were anastomosed with the pig economic types. There were three haplotypes of A, B and C in the imported pigs of Large White and Duroc, and the frequency of haplotype B was greater than those of A and C, which were 0.40 in Large White and 0.53 in Duroc. Only two haplotypes of B and C were detected in Landrace, the frequency of haplotype C was greater than that of haplotype of B. Except of the haplotypes of A, B, and C, a new haplotype of E was detected in Mashen pig population, the frequency was 0.16. The haplotypes had no significant effect on the backfat thickness measured alive in Shanxi White pigs.

Key words: pig; PCR-SSCP; calpastatin gene; backfat thickness

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