氟烷基因与猪经济性状的相关研究

STUDIES ON THE RELATIONSHIP OF HALOTHANE GENE IN PIGS WITH THEIR ECONOMIC TRAITS

诊断了四川省外种猪中长白猪 3个选育群共 343个个体及约克夏猪 10 3个个体的氟烷基因型 ,研究了氟烷基因的遗传规律、在四川省外种猪中的分布以及不同氟烷基因型与猪经济性状之间的关系。研究结果表明 ,氟烷基因的遗传符合孟德尔分离定律 ;四川省外种猪中 ,Haln 基因在长白猪中的频率为 0 .0 10 9～ 0 .170 3,平均为 0 .10 89± 0 .0 85 8,不同选育群中氟烷基因频率差异较大 ;在约克夏猪中Haln 基因频率为 0 .0 2 91。Haln 基因在正常生产过程中对猪的生活力、生长发育性状、胴体性状等无显著不良影响 ,但对猪肉质性状有显著不良影响。Haln 基因对肉质的影响主要表现在肉色、肉pH值和失水率等性状上 ,Halnn型的肉色评分显著低于HalNN型 (P <0 .1) ,pH1显著低于HalNN型 (P <0 .0 5 ) ,失水率显著高于HalNN型 (P <0 .0 5 ) ,HalNn型在此 3个指标上均间于Halnn型与HalNN型之间 。

The frequency of halothane genotypes in 343 pigs of 3 breeding groups of Sichuan Landrace and 103 Yorkshire pigs was investigated and the heredity of the halothane gene, its distribution in Sichuan Landrace and the relationship between halothane genotype and the economic traits of the pigs were studied. The inheritance of the halothane gene was shown to be in agreement with Mendel's law of segregation. In Sichuan Landrace, the frequency of Hal n ranged from 0.0109 to 0.1703, averaging 0.1089±0.0856, with considerable variation among the breeding groups. The frequency of Hal n in Yorkshire pigs was 0.0291. Hal n had no significant negative influence on the growth and carcass traits of the pigs but had significant negative influence on the traits of the pork, as exhibited in pork color, pork pH and moisture loss percentage. The score of meat color and pH 1 of Hal nn were significantly lower than those of Hal NN , while its moisture loss percentage was significantly higher than that of Hal NN . The three indicators of Hal Nn appeared between Hal nn and Hal NN .