The quantitative characters of 30 community plots at different successional stages were studied.
对不同演替阶段30个群落样地的数量特征进行研究。
A hypothesis that two pairs of Mendelian factors can control the quantitative Characters of silkworm is given.
本文在沈敦辉提出四对基因控制家蚕遗传数量性状的基础上，提出两对基因控制数量性状的假设。
The genetic divergence of the quantitative characters of sunflower related to the yield was studied by using polybasic analysis.
本文运用多元分析法测定了向日葵与产量有关的数量性状的遗传距离。
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