猪血浆蛋白(酶)多态性与杂种优势的关系

Relationship between Heterosis and Plamsa Protein(Enzyme) Polymorphism in Pigs

为探讨血浆蛋白 (酶 )多态性与杂种优势的关系 ,测定了杜洛克、长白、大白、杜×长大、大×长大、长×大、大×长共 7个品种 (组合 )的 8个血浆蛋白 (酶 )位点的多态性及部分生长和胴体性状 ,计算了平均基因杂合度与部分经济性状实测值和杂优率的相关关系 .结果表明 ,平均基因杂合度与遗传距离呈正相关 ,与日增重、屠宰率、背膘厚、后腿比例的实测值或杂优率呈正相关 ,与眼肌面积的实测值和杂优率呈负相关 .平均基因杂合度和亲本间遗传距离可为预测杂种优势提供依据 .

With the plasma protein(enzyme) polymorphism of eight loci and the some growth and carcass traits on Duroc(D),Landrace(L),Large White(W),D×LW,W×LW,L×W,W×L breeds or combinations detected and the correlation between average gene heterozygosity and the measured values and heterosis of some economic traits calculated.The result shows that there is positive correlation between average gene heterozygosity and parental genetic distance,and it is the same with the measured values or heterosis of daily gain, dressing percentage, backfat thickness, and percent of hind legs.However,there is negative correlation with the measured value and heterosis of loin eye area.Therefore the average gene heterozygesity and parental genetic distance can be regarded as genetic markers of heterosis predict in pigs.