在对分离世代进行选择处理时，可以选择那些目标性状值较大，而协调指数较小的类型。

The variants which had high value of goal trait and low harmonizing index could be selected when dealt with the separating generations.

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结果表明，中国梨木虱第一、第二世代种群的趋势指数分别为4．189和3．974； 世代的存活率分别为5．818％和5．52％。

The trend indices of population of 1st and 2nd generations were 4.189 and 3.974, the survival were 5.818% and 5.52%.

youdao

结果表明，中国梨木虱第一、第二世代种群的趋势指数分别为4．189和3．974； 世代的存活率分别为5．818％和5．52％。

The trend indices of population of 1st and 2nd generations were 4.189 and 3.974, the survival were 5.818% and 5.52%.

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