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二、后代测验当前在树木育种工作中,都是根据表现型进行选择的。但由于表现型是遗传基础和环境条件相互作用的结果,所以在工作实践中,还须要确定表现型性状受遗传基础或环境条件制约的程度,即作后代测验,以选出真正优良的类型,进行繁殖,用于生产。如:我国北方推广的杨树品种-北京杨,是经过杂种比较试验筛选出来的;南方桉树良种-雷林1号桉,是
Second, the offspring test Currently in the tree breeding work, are based on the phenotype to choose. However, since phenotype is the result of the interaction between genetic basis and environmental conditions, in practice, it is also necessary to determine the degree to which phenotypic traits are restricted by genetic basis or environmental conditions, that is, to test the offspring in order to select a truly good type, To breed for production. Such as: Poplar species popularized in northern China - Beijing Yang, was selected through a hybrid comparative test out; South Eucalyptus - Lei Lin 1 Eucalyptus, is