| Abstract: | Myogenin (MyoG) gene plays a central regulatory role in the process of muscle cell differentiation, which directly affects meat production capacity of animal. In this study, 6 sheep varieties including Large-tail Han sheep, Small-tail Han sheep, Yuxizhiwei sheep, Lanzhou fat-tailed sheep, Mongolia sheep and Tong sheep were selected as experimental materials to detect the polymorphism of MyoG gene exon 1 by non denaturing polyacrylamide gel electrophoresis, and analyze the association analysis between the polymorphism of MyoG gene exon 1 and meat quality traits in sheep. The results showed that 2 alleles (A, B) and 3 genotypes (AA, BB, AB) were detected in MyoG gene exon 1 of six sheep populations. The A allele frequency in Small-tail Han sheep, Large-tail Han sheep, Yuxizhiwei sheep, Lanzhou fat-tailed sheep, Mongolia sheep and Tong sheep were 0.5167, 0.2500, 0.4375, 0.6500, 0.5750 and 0.7125, respectively, the B allele frequency of six sheep populations were 0.4833, 0.7500, 0.5625, 0.3500, 0.4250 and 0.2875, respectively. MyoG gene exon 1 mainly affected the moisture and color of mutton, the moisture content of BB genotype was significantly higher than that of AB genotype (P< 0.01) and AA genotype (P< 0.05). The color of AB genotype was significantly higher than that of BB genotype (P< 0.01) and AA genotype (P< 0.05). |
