这样就对基因的绝对适合值（absolute fitness value）加大了胁强（stress），过份估价了累加基因效应（additive gene effects）并进而作出了自然选择的目标是基因而不是个体的假定。这就必然只能得到不切实际的结果。
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effects of additive gene 加性基因效应
The results showed that the heredity of quality characters was induced mainly by additive gene effects. The changes in brix, PR, Pol and SC were affected by male parents.
结果表明，品质性状的遗传主要由 基因加性效应引起，其中蔗汁锤度、旋光读数、转光度、蔗汁蔗糖分主要由父本 基因加性效应引起。
The results showed that the weak light-resistant ability of tomato has significant hereditary effects on dominant character and gene interaction while there exists part additive effect of heredity.
结果表明：番茄耐弱光性以显性遗传和基因互作效应为主，存在部分加性遗传效应。
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