摘要
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 characters from 70 innovated germplasm materials F1 of Saccharum spontaneum L. were processed by factor and cluster analysis. Results of factor analysis showed that the top three common factors were retained in 8 common factors, and the cumulative contribution rate reached 79.35%. Yield, sucrose content in cane, stalk number, emergencerate,and tillering rate owned higher loading values in the first common factor. The stalk di- ameter and plant height played leading roles in the second common factor,and only sucrose content in cane played a leading role in the third one. The variance scores of the 70 innovated materials of the top three common factors were used for comprehensive cluster analysis with the longest distance method. At the genetic distance 2.4,the materials could be divided into 10 groups, in which five groups i.e. I , IV, VII ,VIII ,and X showed the characteristic of high yield,accounting for 50% of the total tested materials. The groups I , 1I , IV, V, WI, VII, and IX showed the characteristic of high sugar, accounting for 72.8% of the total, especially the groups I , IV, V ,and VI ,which sucrose content in cane was higher than 12% ,accounting for 38.6% of the total. The groups I , IV ,and VII showed the characteristics of high sugar and high yield, accounting for 38.6% of the total. The classification results provide a scientific basis for targeted utilization of these innovated germplasm materials to breed the parents with high yield and high sugar characteristics.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2014年第1期177-181,共5页
Journal of Plant Genetic Resources
基金
国家甘蔗产业体系遗传育种研究室岗位专家(YCYTX-024-01-03)
高产高糖强宿根甘蔗新品种选育及产业化开发(2012BB014)
关键词
割手密
种质创新
因子分析
聚类分析
Saccharum spontaneum L.
germplasm innovation
factor analysis
cluster analysis
