杨学乐,何录秋,张璐,李志清.湖南芝麻种质资源农艺性状的遗传多样性[J].湖南农业大学学报:自然科学版,2019,45(6):.
湖南芝麻种质资源农艺性状的遗传多样性
  
DOI:
中文关键词:  芝麻  种质资源  农艺性状  遗传多样性  湖南
英文关键词:sesame  germplasm resources  agronomic traits  genetic diversity  Hunan
基金项目:湖南省科学技术厅项目(2018xk2005);农业部物种资源保护费项目湖南子项目(1120162130135252036);湖南省旱粮产业技术体系项目(湘农发〔2019〕105号)
作者单位
杨学乐,何录秋,张璐,李志清 湖南省作物研究所湖南 长沙 410125 
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中文摘要:
      采用主成分分析和聚类分析的方法,对收集的湖南省63份芝麻种质资源的12个质量性状和9个数量性状进行遗传多样性分析。结果表明:湖南省芝麻资源具有广泛的遗传多样性,12个质量性状中,茎秆绒毛的遗传多样性指数最高,为1.310,叶序的最低,为0;9个数量性状中,空梢尖长的变异系数最大,为39.962%,千粒质量的最小,为12.397%;9个数量性状的主成分分析结果表明,前4个主成分的累计贡献率达74.076%。63份种质可分为4大类:第Ⅰ类(24份)可作为选育四棱以上芝麻品种的候选群体;第Ⅱ类(34份)可作为选育丰产型品种的候选群体;第Ⅲ类(2份)可作为选育矮秆型品种及蒴果长度较长品种的候选群体;第Ⅳ类(3份)可作为选育分枝型品种的候选群体。
英文摘要:
      Twelve qualitative traits and 9 quantitative traits of 63 sesame genotypes had been analyzed for genetic diversity by using cluster analysis and principal component analysis. The results showed that abundant genetic diversity existed among the sesame in Hunan. The genetic diversity index of stem fluff(1.310)was the highest among the 12 quality traits, the lowest is phyllotaxis(0). The genetic variation of infertile(39.962%) was the highest among the 9 quantitative traits, the lowest was 1 000-seed weight. The principal components analysis based on 9 quantitative traits, indicated the accumulative contribution of 74.076% was from the top 4 principal components. Sixty-three sesame germplasm accessions were classified into 4 groups. The genotypes from the first group(24) could be used for a candidate group for breeding sesame varieties with more than four arrises; the genotypes from the second group(34) could be used for a candidate group for breeding varieties with high yield; the genotypes from the third group(2) could be used for a candidate group for breeding varieties with dwarf or varieties with longer capsule lengths; the genotypes from the fourth group(3) could be used for a candidate group for breeding varieties with branch.
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