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《Hereditas(Beijing)》 2005-06
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The Genetic Diversity and Genetic Effects of Myf-6 Gene in Different Pig Breeds

ZHU Li,LI Xue-Wei(College of Animal Science and Technology,Sichuan Agricultural University,Ya'an 625014,China)  
As a member of MRFs,Myf-6 gene plays an important role in the progress of myogenesis.The PCR-RFLP technique was applied in this study to analyze the distribution of Myf-6 gene in 12 different pig breeds and hybrid breeds.The genetic effects of Myf-6 gene on muscle fiber,carcass quality,carcass grading traits and meat quality traits were analyzed.The results indicated that: The polymorphisms of Myf-6/Ava I genotypes(intron1) were not abundant.Most of Chinese native pigs were AA homozygotes.B allele can be found only in foreign pig breeds and hybrid pigs originated from foreign pig breeds.Although no BB individuals were found in the experiment,the carcass lean percent of AB individuals(50.344 %) was significantly higher than that of AA individuals(45.875 %)(P0.01),the loin eye area of AB individuals(27.097 cm~2) was significantly larger than that of AA individuals(22.572 cm~2)(P0.01),and the carcass fat content of AB individuals(39.889 %) was significantly lower than that of AA individuals(44.503 %)(P0.01).That means that the B allele can increase carcass lean percent and loin eye area,and decrease the carcass fat content,thus cause better carcass quality.No significant effects of the genotypes were found on the muscle fiber,FOM carcass grading traits and meat quality traits(P0.05).
【Fund】: 国家科技攻关项目:“瘦肉型猪规模化养殖技术体系研究与产业化示范”;; 四川省科技厅重点项目:“四川省外种猪联合育种研究”基金资助~~
【CateGory Index】: S828;
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