SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY

Volume 41, No. 05, Month SEPTEMBER, Year 2019, Pages 1069 - 1075

Polymorphisms of candidate genes associated with feed efficiency and growth traits in commercial crossbred pigs

Wootichai Kenchaiwong, Monchai Duangjinda, Wuttigrai Boonkum

Abstract Download PDF

Feed efficiency is an important trait in the swine industry, but it is difficult to measure individually for genetic improvement. A total of 184 commercial pigs (50% Duroc, 25% Large White, and 25% Landrace) were collected for blood and genotyped. The average daily gain, daily feed intake (DFI), feed conversion ratio (FCR), gain per feed (G/F) and residual feed intake (RFI) were used in the analysis. The PCR-RFLP was used for the genotyping of candidate gene markers. The associations of gene polymorphism (cholecystokinin type A receptor (CCKAR), melanocortin 4 receptor (MC4R), leptin gene (LEP), porcine cathepsin with feed efficiency and growth traits in commercial pigs were investigated. The AA genotype of MC4R was significantly associated with the DFI at P=0.01. The polymorphism in porcine cathepsin D (CTSD) and cathepsin Z (CTSZ) were significantly associated with FCR, G/F, and RFI at P<0.05. The low FCR was associated with GG genotype in CTSZ and CTSD.

Keywords

growth, feed efficiency, markers associated, pigs

---