Calpastatin gene polymorphism is associated with rabbit meat quality traits

Abstract

The objective of this study was to investigate single nucleotide polymorphisms in the calpastatin (CAST) gene and to test their association with meat quality traits in Hyla, Champagne, and Tianfu Black rabbit breeds. We detected one single nucleotide polymorphism (g.16441502 C > T) located at 67 bp in intron 3 of the CAST gene in Chromosome 11. The three rabbit populations had intermediate levels of genetic diversity in the CAST gene. The statistical analysis indicated that rabbits with the TT genotype had a significantly greater yellowness at 0 and 24 h postmortem than those with the CC genotype (P < .05) in the longissimus dorsi muscle. Rabbits with CC genotype had higher intramuscular fat content than those with CT and CC genotypes in both longissimus dorsi and biceps femoris muscles in the three breeds (P < .05). Our results indicated that the CAST gene may be used as a possible candidate for marker-assisted selection in rabbit meat breeding programmes.