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对保存于“农业部景洪橡胶树种质资源圃”的1904份橡胶树81’IRRDB种质资源的主干通直度、主干分杈、侧枝分枝轮、侧枝粗细、侧枝分枝角、侧枝伸展等6个表型性状进行调查和分析。结果表明,云南保存橡胶树种质资源具有丰富的遗传多样性(0.2604~1.6731),多样性指数最高的是主干通直度,达1.6731,其次是主干分杈、侧枝粗细、侧枝分枝轮和侧枝分枝角,最低的是侧枝伸展。6个表型性状的相对分布频率最小值为2.92%~8.05%,最大值为41.26%~93.37%。用UPGMA法聚类,当欧式距离为1.05时,1904份样本被聚为5组,其中最大1组包括98.42%的样本,表明同一性状在每份种质资源间具有很大程度的相似性;用Furthest Neighbor法聚类,在欧式距离为1.45时,1904份样本被聚为7组。2种聚类方法都能将每份种质明显区分出来,表明各性状变异极其丰富。
The trunk straightness of the 1904 rubber tree 81’IRRDB germplasm resources preserved in the “Ministry of Agriculture, Jinghong Rubber Tree Germplasm Resources Garden” was divided into two main branches: main branches, branch branches, collateral branches, branch branches, branches Stretching and other six phenotypic traits to investigate and analyze. The results showed that the genetic diversity of rubber tree germplasm resources preserved in Yunnan was rich (0.2604-1.66731), the highest diversity index was 1.6731, followed by trunk twigs, collateral thickness, collateral branches and collateral Branch angle, the lowest is the collateral extension. The minimum relative distribution frequencies of 6 phenotypic traits ranged from 2.92% to 8.05% and the maximum values ranged from 41.26% to 93.37%. UPGMA method was used to cluster 1904 samples at a distance of 1.05 at the European distance. Among them, the largest one included 98.42% of the samples, indicating that the same trait has a great degree of similarity among each germplasm resource. Clustering with the Furthest Neighbor method, 1904 samples were clustered into 7 groups at a European distance of 1.45. Two kinds of clustering methods can obviously distinguish each germplasm, which indicates that the variation of each trait is extremely rich.