以DNA核苷酸多态性为基础的分子标记技术，在DNA分子水平，实验室条件下，揭示性状的遗传差异，为遗传研究提供了有力手段。
The molecular markers of DNA_based polymorphism reveal the genetic variation at DNA level in laboratory, which have provided a powerful tool to genetic study.
目的从分子遗传水平进行基因多态性研究，以探讨2型糖尿病易伴发冠心病的内在原因。
Objective To explore the association of type 2 diabetes with coronary heart disease (CHD), from gene polymorphism analysis.
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.
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