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对油桐不同类型的１２ 个家系作了树体及产量性状的幼成年相关分析，表明家系间存在遗传上的差异，并且遗传力和年度间的重复力较高；主干粗、枝下高两性状１ 年生和５ 年生有较紧密的遗传相关，树高性状相关不密切；２ 年生与３ 至６ 年生各年的产量呈负向的遗传相关，其余各年度间的遗传相关是正向的，表型相关与其对应。“早丰”类家系在１ 年生时就可以进行树体性状的早期选择，２ 年生时对结实量进行预测和选择，就有着一定的可靠性；而高产稳产类树体和产量的早期选择需相应推迟１ ～２ ａ。
The juvenile correlation analysis of tree body and yield traits in 12 different families of tung tree showed that there was a genetic difference among the families and the heritability and the repetitive force between years were higher. 1-year-old and 5-year-old have close genetic correlation, tree height traits are not closely related; 2-year-old and 3 to 6 years of production in each year showed a negative genetic correlation, the rest of the years of genetic correlation is positive, the table Related and Corresponding. The early Feng family can make early selection of tree traits at 1-year-old, and have certain reliability when predicting and selecting the yield at 2-year-old. The early selection of high-yield and stability-yielding trees and yield The corresponding postponed 1 ~ 2 a.