中文摘要：

【目的】揭示橡胶树胶乳主要生理参数与产量的相关性,从橡胶树群体后代中筛选具有高产潜力的优异种质材料。【方法】测定橡胶树热研2-73×PB5/51F1群体的胶乳生理参数,采用方差分析、相关分析、主成分分析、聚类分析和判别分析等方法,对橡胶树群体的胶乳生理参数进行分析。【结果】热研2-73×PB5/51F1群体中37个单株间的干胶产量（DRY）、胶乳产量（LY）、总固形物含量（TSC）、C-乳清蛋白含量（PC）、转化酶活性（IA）和蔗糖浓度（SC）差异均达极显著水平;DRY、LY与IA、PC呈显著正相关。选出2个主成分进行分析,2个主成分的方差累计贡献率达67.10%;对DRY、LY、TSC、PC、IA和SC 6个生理指标的聚类结果显示,可将37个橡胶树品种聚为A、B、C3类,并对应建立了3个判别能力较高的模型,其中A类的10株橡胶树为高干胶产量、高胶乳产量、高转化酶活性及高C-乳清蛋白含量类型,极具进一步选育的价值。【结论】橡胶树产量与转化酶活性密切相关,同时筛选到了10株具有高产潜力的优异种质材料。

英文摘要：

[Objective] This work revealed correlation between latex physiological parameters and yield,aiming to improve the selection of elite germplasms. [Method] The physiological parameters in F1 group Reyan 2-73 X PBS/51 of Hevea brasiliensis were measured and analyzed by variance, correlation, principal component,cluster and discrimination analyses. [Result] There were significant differences （P〈 0.01） in dry rubber yield （DRY） ,latex yield （LY） ,total solids content （TSC） ,invertase activity （IA） ,su- crose content （SC） and protein content （PC） among the tested trees. DRY and LY were positive signifi- cantly correlated with IA and PC. Two principal components were analyzed and their cumulative contribu- tions to variance were up to 67.10%. Thirty seven trees were clustered into three groups based on DRY, LY, TSC, IA, SC and PC, and three discrimination models with high distinguishing ability were established. The group A including 10 trees with high DRY,LY,IA and PC could be used for further selection of rub- ber trees. [Conclusion] The yield had a correlation with IA, and 10 trees were selected as elite germplasms.