Polymorphisms of Candidate Genes Associated with Growth and Carcass Traits in Canadian Duroc Pigs

Background: Selection based on traits such as average daily gain (ADG) and carcass quality in commercial pig populations have drawn attention of swine breeders due to the correlation with growth consumer preference for composition, respectively. The association between melanocortin 4 receptor (MC4R) gene, which encodes G-protein-coupled ADG quality, been well documented. study was conducted determine effects MC4R/TaqI PIT-1/RsaI polymorphisms total 576 Duroc pigs at national breeding farms Vietnam. Methods: After performance test, desired including ADG, IF LD were measured. (g/day) calculated live weight divided by number days from birth 100 kg, BF can be captured position P2 (6-8 cm away body midline last rib level) Ultrasound machine Aloska SSD 500V. Genomic DNA collected genotyped observe polymorphism MC4R PIT-1. Result: Three genotypes AA, AG andGG gene andAA, AB BB PIT-1 found studied population. observed frequencies GG 0.09, 0.41 0.50 (MC4R gene) 0.37, 0.47 0.16, G allele B (PIT-1) more positive LD. Specifically, individuals carrying genotype had higher 50 gram lower 1.4 mm than AA genotype. In 37 1.9 mm, Therefore, increased selection allele, should considered contribute improvement population current