| 桂糖系列甘蔗种质资源数量性状的主成分分析和聚类分析 |
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| 引用本文： | 周会,杨荣仲,方锋学,李杨瑞.桂糖系列甘蔗种质资源数量性状的主成分分析和聚类分析[J].西南农业学报,2012,25(2):390-395. |
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| 作者姓名： | 周会 杨荣仲 方锋学 李杨瑞 |
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| 作者单位： | 中国农科院甘蔗研究中心/广西农业科学院甘蔗研究所/广西甘蔗遗传改良重点实验室,广西南宁,530007 |
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| 基金项目： | 广西自然科学基金项目，甘蔗产业技术体系项目，广西农业科学院基金项目，科技部国际合作项目 |
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| 摘 要： | 通过分析评价桂糖系列甘蔗种质资源重要数量性状,为甘蔗育种中性状选择提供参考。利用主成分分析和聚类分析对111份桂糖系列甘蔗种质资源9个数量性状进行分析。结果:主成分分析表明甘蔗9个数量性状可简化为4个主成分,即糖分因子、茎径-叶因子、茎数-叶因子和株高因子,4个主成分累计方差贡献率达74.42%,糖分因子为第一主成分,茎径与茎数之间互有较大的负效应,株高因子则较为独立。聚类分析表明111份桂糖甘蔗种质资源可以分为高糖类群(含3个亚类)和低糖类群(含2个亚类),高糖类群以年代较近的材料为主,低糖类群以年代较远的材料为主。糖分性状在甘蔗育种中起着重要作用,在糖料蔗育种中实生苗选择时建议以锤度为主,注重株高和有效茎数,茎径以中至中大茎为主;在过去的几十年中广西甘蔗育种者非常注重糖分性状的改良,并取得了巨大成就。
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| 关 键 词： | 甘蔗 桂糖系列 数量性状 主成分分析 聚类分析 |
Principal Component and Cluster Analyses for Quantitative Traits in GT Sugarcane Germplasm (Saccharum spp.Hybrids) |
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| ZHOU Hui
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YANG Rong-zhong
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FANG Feng-xue
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LI Yang-rui.Principal Component and Cluster Analyses for Quantitative Traits in GT Sugarcane Germplasm (Saccharum spp.Hybrids)[J].Southwest China Journal of Agricultural Sciences,2012,25(2):390-395. |
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| Authors: | ZHOU Hui YANG Rong-zhong FANG Feng-xue LI Yang-rui |
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| Institution: | (Sugarcane Research Center,Chinese Academy of Agricultural Sciences/Sugarcane Research Institute,Guangxi Academy of Agricultural Sciences/Guangxi Key Laboratory of Sugarcane Genetic Improvement,Guangxi Nanning 530007,China) |
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| Abstract: | The present study was conducted in order to study and evaluate the quantitative traits of GT sugarcane germplasm.Nine quantitative traits of GT sugarcane germplasm were investigated with principal component and cluster analyses.There were 4 principal components including sugar factor,stalk diameter-leaf factor,stalk number-leaf factor and stalk height factor were extracted from 9 quantitative traits.These principal components cumulated 74.42 % variance proportion.Sugar factor was the first principal component.There was negative effect between stalk diameter and number.Stalk height was relatively independent from other traits.Cluster analysis could divide the 111 accessions of sugarcane germplasm into high sugar group(including 3 subsets) and low sugar group(including 2 subsets),most of the germplasm accessions collected in recent years were clustered into high sugar group,and most of germplasm collected in earlier years were clustered into low sugar group.Sugar trait played an important role in sugarcane breeding.Brix was the first important trait in seedling selection.In regular commercial sugarcane breeding,it was suggested Brix should be a key trait and followed by stalk height and millable stalks,and focusing on medium to medium-large stalk diameter in seedling selection.Sugar trait improvement made great progress in GT sugarcane breeding in decades. |
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| Keywords: | GT variety Sugarcane Quantitative traits Principal component Cluster analysis |
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