| 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×PB5/51 F1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×PB5/51 F1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、C 3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。 |
| 关键词: 橡胶树 胶乳生理参数 数值分类 聚类分析 |
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| 基金项目:国家自然科学基金项目（31170630）；海南省自然科学基金项目（312029，310094）；国家天然橡胶产业技术体系育种岗项目（CARS-34） |
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| Comparison and cluster analysis of latex physiological parameters in F1 group Reyan2-73×PB5/51 of Hevea brasiliensis |
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LONG Xiang-yu,WANG Yue-kun,QIN Yun-xia,et al
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| Abstract: |
| 【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×PB5/51 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),sucrose content (SC) and protein content (PC) among the tested trees.DRY and LY were positive-significantly correlated with IA and PC.Two principal components were analyzed and their cumulative contributions 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 rubber trees.【Conclusion】The yield had a correlation with IA, and 10 trees were selected as elite germplasms. |
| Key words: Hevea brasiliensis physiological parameter numerical classification cluster analysis |
