橡胶树栽培种质农艺性状的相关性和聚类分析

Correlation and Cluster Analysis of Agronomic Traits in Rubber Tree

以我国国家橡胶树种质资源圃保存的119份橡胶树栽培种为材料,对叶蓬形状、叶面绿色程度等21个农艺性状进行比较分析。结果表明,遗传多样性指数平均值为0.83,叶痕形状最高为1.20,蜜腺表面形态为0.27,且性状数据分布集中;各性状中变异系数最大的大叶柄形状为60.03,蜜腺表面形态最小为9.08,平均值为33.88;叶面绿色程度和叶面光泽度、叶片形状与叶片基部形状等7对性状相关性极显著;21个性状可聚为2大类,119份供试材料中,同一品种来源地、亲本和子代、具有类似品种特性(抗寒性)等类型的品种聚为一类。分析结果可供橡胶树种质资源鉴定和杂交亲本选配参考。

The comparative analysis of twenty-one agronomic traits were assessed in rubber tree genetics resources in national rubber tree germplasm repository. The results indicated that, the diversity indexes ranging from 0. 27 （ nectar gland） to 1.20 （ shape of leaf scar） with an average of 0. 83. The coefficients of variation ranging from 9.08 （nectar gland）to 60.03 （shape of petiole）and average was 33.88. It was significantly rated in seven pairs of traits, such as intensity of green color of upper side and glossiness of upper side , shape and shape of base. All of the agronomic traits could be classified into 2 clusters. The test clones were clustered into geographical region, parents and offspring, characteristic. The obtained results can be referenced for evaluating germplasm resources and parental selection of breeding.