摘要
调查了100份陆地棉主推品种种质资源的12项指标,包括株高、果枝数、吐絮铃数、铃质量、衣分、子指、皮棉产量、上半部平均长度、长度整齐度指数、断裂比强度、断裂伸长率、马克隆值,运用相关性分析、主成分分析和聚类分析对参试品种种质资源进行综合评价。结果表明:100份材料的产量性状变异程度较大,品质性状变异程度较小;单铃质量与吐絮铃数、皮棉产量存在极显著正相关,与衣分存在显著正相关;上半部平均长度与整齐度、断裂比强度之间存在极显著正相关,与断裂伸长率、马克隆值之间存在极显著负相关;前4个主成分分别代表了100个棉花品种12项数量性状的68.12%的信息,其贡献率分别为22.934%、22.377%、13.169%和9.641%;当欧氏距离为10.01水平时,可将100份参试品种分为6大类。综合分析,该批种质的类型多样,但综合性状表现一般,尤其是纤维品质性状表现一般,在以后的育种研究中,应主要注重提高该批材料的纤维品质。
One hundred main varieties of upland cotton were investigated by collecting 12 indicators of the germplasm resources,including plant height,fruit branch number,boll number,boll quality,lint,sub-finger,lint yield,upper half average length,and length uniformity index,breaking strength,breaking elongation,micronaire value.These indicators were subject to correlation analysis,principal component analysis and cluster analysis in order to evaluate the germplasm resources of the tested varieties.The results showed that the variation of yield traits of 100 materials was large,and the variation of quality traits was small;the quality of single bolls had a very significant positive correlation with the number of bolls and lint yield;and there was a significant positive correlation with the lint;the upper half average length was significant positive correlation between length uniformity and breaking ratio strength,and a very significant negative correlation with breaking elongation and micronaire value;the first four principal components represent the 12 quantitative traits of 100 cotton varieties.With 68.12%of the information,the contribution rates were 22.934%,22.377%,13.169%and 9.641%respectively;when the euclidean distance was 10.01,the 100 test varieties could be divided into six categories.Based on the above analysis,this batch of germplasm had diverse types with average performance on the studied traits.This results indicated that we should mainly improve the fiber quality of this batch of materials for breeding research in future.
作者
彭嘉熹
周仲华
马肖
王峰
PENG Jiaxi;ZHOU Zhonghua;MA Xiao;WANG Feng(Cotton Research Institute,Hunan Agricultural University,Changsha,Hunan 410128,China)
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2021年第1期23-29,共7页
Journal of Hunan Agricultural University(Natural Sciences)
基金
国家重点研发计划项目(2016YFD0100203-10、2018YFD0100404)
湖南省自然科学基金省市联合基金项目(2018JJ4014)。
关键词
陆地棉
种质资源
农艺性状
纤维品质
主成分分析
聚类分析
综合评价
upland cotton
germplasm resources
agronomic characters
fiber quality
principal components analysis
cluster analysis
comprehensive evaluation
