从猪蛋白质（酶）多态性和DNA分子水平上估测出亲本种群间的遗传距离，探讨它们与基因杂合度及经济性状杂优率之间的关系。
Parental genetic distances were evaluated by plasma protein(enzyme) polymorphisms and DNA molecular level. Their relationship with gene heterozygosities and heterosis of various traits were analyzed.
三个血液蛋白质位点的平均基因杂合度为0.3396。
The average gene heterogeneity on the three loci was 0.3396.
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