There are lots of theories regarding the leadership. Such as: trait theories, contingency theory, behavioural theory, participative theory, situational theories.
有很多关于领导理论，比如：特质理论，权变理论，行为理论，参与式理论，情境理论。
The theories, located principle, research methods and present situation of quantitative trait loci and major gene were summarized in the paper.
本文介绍了畜禽数量性状座位及主基因的理论、定位原理、方法以及研究现状。
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