Through combining ability and genetic effect analyses of 20 crossing from a set of 5 >< 5diallel crosses to establish the base theory of quality breeding for Chinese cabbage.
最后对5份亲本，20个杂交组合进行配合力和遗传效应分析，为大白菜的品质育种提供理论依据。
The paper points out its fundamental purpose and positive effect, analyses its negative effect and discusses how to use the system in a rational way.
本文从一个较全面的角度，指出末位淘汰制的根本目的和积极作用，分析其负面效应，重点探讨应慎用此制度并指出实施中应注意的问题。
The paper points out its fundamental purpose and positive effect, analyses its negative effect and discusses how to use the system in a rational way.
本文从一个较全面的角度，指出末位淘汰制的根本目的和积极作用，分析其负面效应，重点探讨应慎用此制度并指出实施中应注意的问题。
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