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对70份云南割手密血缘F1创新种质材料8个农艺性状进行了因子和聚类分析,因子分析中8个公因子保留前3个公因子,其累计贡献率达79.35%。第1公因子中载荷值较大的是单产、含糖量、有效茎数、出苗率和分蘖率等性状;第2公因子中起主导作用的性状是茎径和株高两个产量因子;第3公因子只有11月理论蔗糖分起主导作用。以70份创新材料3个公因子的因子得分为指标,采用系统聚类中的最长距离法进行聚类分析。在遗传距离2.4处,参试材料被聚为10类,其中占参试材料总数50%的第Ⅰ、Ⅳ、Ⅶ、Ⅷ、Ⅹ类材料,表现高产;占参试材料72.8%的第Ⅰ、Ⅱ、Ⅳ、Ⅴ、Ⅵ、Ⅶ、Ⅸ类材料,表现高糖,特别是其中占参试材料38.6%的Ⅰ、Ⅳ、Ⅴ、Ⅵ类材料,11月理论蔗糖分均高于12%;占参试材料总数38.6%的第Ⅰ、Ⅳ、Ⅶ类材料,表现高产、高糖。本结果为有针对性地利用这些材料,培育高产、高糖创新亲本提供了科学依据。
Eight agronomic traits of F1 germplasm material from 70 germplasm resources of Yunnan cuttings were analyzed by factor and cluster analysis. The eight common factors in the factor analysis retained the first three common factors, and the cumulative contribution rate was 79.35%. In the first factor, the higher load value is the yield, the sugar content, the number of effective stalks, the rate of emergence and the rate of tillering and so on. The dominant factor of the second factor is the yield factor of stem diameter and plant height. The third factor was only the theoretical sucrose fraction which dominated in November. Based on the scores of 70 common factors of three common factors in innovative materials, the cluster analysis was conducted by the longest distance method in the system of clustering. At the genetic distance 2.4, the tested materials were clustered into 10 categories, among which the materials of Ⅰ, Ⅳ, Ⅶ, Ⅷ and Ⅹ accounted for 50% of the total tested materials, which showed high yield; the first, Ⅱ, Ⅳ, Ⅴ, Ⅵ, Ⅶ and Ⅸ, which showed high sugar, especially Ⅰ, Ⅳ, Ⅴ and Ⅵ, which account for 38.6% of the tested materials. The theoretical sucrose content in November was above 12% A total of 38.6% of the materials tested Ⅰ, Ⅳ, Ⅶ class materials, high yield, high sugar. The results provide a scientific basis for the targeted use of these materials to breed high-yield, high-sugar innovative parents.