6个橡胶树优树无性系阶段性综合评价

The Stage Comprehensive Evaluation of 6 Superior Clones of Hevea brasiliensis

为探明6个橡胶树优树无性系的生长和产胶能力,测定7 a生时的生长量、胶乳产量、胶乳生理及胶乳性能,通过方差分析、相关性分析、主成分分析及隶属函数法对不同橡胶树优树无性系进行综合评价。结果显示:(1)平均茎围大小排序为:‘云研314’>‘云研272’>‘云研617’>‘云研77-4’(对照)>‘云研585’>‘云研190’。(2)平均每株年总胶乳产量、平均每段胶乳产量、平均每株每刀胶乳产量排序均为:‘云研314’>‘云研272’>‘云研617’>‘云研77-4’(对照)>‘云研585’>‘云研190’。(3)硫醇、蔗糖含量与胶乳产量达到极显著正相关(P<0.01);无机磷含量与胶乳产量呈正相关但是相关性较小;总固形物含量与胶乳产量呈显著负相关(P<0.05)。(4)通过主成分分析和隶属函数的综合评价可以得出,‘云研272’和‘云研314’生长和产胶综合性状优于‘云研77-4’(对照),‘云研617’与‘云研77-4’(对照)相当,‘云研585’和‘云研190’次于‘云研77-4’(对照)。(5)6个橡胶树优树无性系的P 0、PRI都达到了GB/T8081-2018规定的质量要求。

In order to explore the growth and gum production ability of six superior clones of rubber tree,the growth,latex yield,latex physiology and latex properties of rubber trees at 7 years old were measured.By using variance analysis,correlation analysis,principal component analysis and membership function analysis,the comprehensive evaluation of different superior clones of rubber tree was carried out.The results showed that:(1)The order of average stem circumference was:‘Yunyan 314’>‘Yunyan 272’>‘Yunyan 617’>‘Yunyan 77-4’(control)>‘Yunyan 585’>‘Yunyan 190’.(2)The average annual total latex yield per plant and average latex yield per knife per plant were ranked as follows:‘Yunyan 314’>‘Yunyan 272’>‘Yunyan 617’>‘Yunyan 77-4’(control)>‘Yunyan 585’>‘Yunyan 190’.(3)The contents of thiol and sucrose were significantly positively correlated with latex yield(P<0.01).The content of inorganic phosphorus was positively correlated with latex yield,but the correlation was small.There was a significant negative correlation between the content of total solids and latex yield(P<0.05).Through the use of principal component analysis and membership function method,the results of comprehensive evaluation showed that the comprehensive traits of growth and gum production of‘Yunyan 272’and‘Yunyan 314’were better than‘Yunyan 77-4’(control),‘Yunyan 617’and‘Yunyan 77-4’(control)were close,‘Yunyan 585’and‘Yunyan 190’were slightly worse than‘Yunyan 77-4’(control).(5)The P 0 and PRI of the latex of the six superior clones of rubber trees reached the quality requirements specified in GB/T8081-2018 in winter.