INVESTIGATION OF CATHEPSIN B (CTSB) and CATHEPSIN L (CTSL) POLYMORPHISM FOR CARCASS AND MEAT QUALITY IN SWINE

Authors

  • Doungnapa Promket
  • Kajorngiat Nabundit
  • Khanitta Ruangwittayanusorn

Keywords:

Cathepsin B, Cathepsin L, Swine, Polymorphism

Abstract

The objectives of the research were to evaluate genotype frequencies and to investigate polymorphism in the cathepsin B gene (CTSB) and cathepsin L gene (CTSL) with carcass and meat quality in 288 crossbreeds (large white x landrace x duroc). Pigs whose weights ranged from 78-134 kg were assigned to slaughter. PCR-RFLP protocols were used to identify polymorphisms of both genes. The frequencies of AA, AC and CC genotypes of CTSB were 0.340, 0.615, and 0.045, respectively. The frequencies of A and C alleles of CTSB were 0.648 and 0.352, respectively. Regarding CTSL, the frequencies of CC, CT and TT genotypes were 0.625, 0.354, and 0.021, respectively. The frequencies of C and T alleles of CTSL were 0.802 and 0.198, respectively. The significant effects of CTSB polymorphism were detected on body length (BL), a scan of loin eye area (U_LAE), loin eye area (LAE), and weight loss (WL) (P<0.05). The pigs carrying the AC genotype had a higher level of BL, U_LEA and LEA than the ones carrying the homozygous genotype (AA or CC). The pigs with the CC genotype of CTSB had lower WL (1.86 kg) than the ones carrying the AA or the AC genotype (2.19 and 1.97 kg). The CTSL variants represented statistically significant effects on BL trait (P<0.05). The CC genotype (77.92 cm) had higher BL value compared to the CT (76.14 cm) and the TT genotypes (76.92 cm). The CTSB and CTSL were high polymorphism and their alleles could be as the potential genetic markers for swine selection.

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Published

2019-10-28

How to Cite

Doungnapa Promket, Kajorngiat Nabundit, & Khanitta Ruangwittayanusorn. (2019). INVESTIGATION OF CATHEPSIN B (CTSB) and CATHEPSIN L (CTSL) POLYMORPHISM FOR CARCASS AND MEAT QUALITY IN SWINE. GEOMATE Journal, 17(62), 153–157. Retrieved from https://geomatejournal.com/geomate/article/view/679

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