木薯种质的遗传多样性评价及高产种质初级筛选

为加强木薯现有选育材料和引进种质的研究利用，本研究以主栽品种SC8和SC205为对照，对142份选育材料和8份瑞士引进新种质进行了16个表型性状的鉴定和EST—SSR标记，分析和评价其遗传多样性；运用主成分分析法挖掘高产木薯种质。分子标记聚类分析表明种质间的遗传相似系数均值为0．652，基于表型性状的聚类遗传相似系数均值为0．186，2种聚类结果之间差异显著，但均表明种质间有一定的遗传差异。2年产量相关性状调查结采差异极显著，表明受环境影响较大。产量相关性状的主成分分析结果表明，C322综合评价表现最好，G74综合评价表现最差，同时，有47份选育材料的综合评价优于2份对照。在今后杂交育种工作中...

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Bibliographic Details
Published in植物遗传资源学报 Vol. 15; no. 1; pp. 74 - 83
Main Author 薛月寒 吴文嫱 叶剑秋 李开绵 黄东益
Format Journal Article
LanguageChinese
Published 2014
Subjects
EST—SSR
木薯
种质筛选
表型性状
遗传多样性
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Summary:为加强木薯现有选育材料和引进种质的研究利用，本研究以主栽品种SC8和SC205为对照，对142份选育材料和8份瑞士引进新种质进行了16个表型性状的鉴定和EST—SSR标记，分析和评价其遗传多样性；运用主成分分析法挖掘高产木薯种质。分子标记聚类分析表明种质间的遗传相似系数均值为0．652，基于表型性状的聚类遗传相似系数均值为0．186，2种聚类结果之间差异显著，但均表明种质间有一定的遗传差异。2年产量相关性状调查结采差异极显著，表明受环境影响较大。产量相关性状的主成分分析结果表明，C322综合评价表现最好，G74综合评价表现最差，同时，有47份选育材料的综合评价优于2份对照。在今后杂交育种工作中可选择亲缘关系较远且表型差异互补的种质作为杂交亲本，以进一步聚合优良性状，改良不利性状。
Bibliography:In order to research and utilize the breeding materials and introduced germplasm of cassava,we selected the cuhivars SC8 and SC205 as control,analyzed 16 phenotype traits and evaluated the genetic diversity of 142 breeding materials and 8 Switzerland introduced germplasms, and hoped to find high-yield cassava resources using principal component analysis. The results showed that the average genetic similarity among the germplasms was 0. 652, while phenotypic traits-based clustering genetic similarity coefficient was 0. 186. The two clustering results were significantly different,but the results showed that all of the materials had abundant gentic differences. The two years study of yield-related traits indicated the significant difference. Meanwhile,it showed the environment influenced the results. The principal component analysis of yield-related traits showed that the best comprehensive evaluation of the performance was C322,and G74 was the worst. Meanwhile, there were 47 breeding materials superior to the t
ISSN:1672-1810