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首页> 外文会议>2011 International Conference on Environmental, Biomedical and Biotechnology >Genetic diversity of germination attributes in Agropyron desertorum genotypes under salinity stress condition
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Genetic diversity of germination attributes in Agropyron desertorum genotypes under salinity stress condition

机译：盐分胁迫条件下Agropyron desertorum基因型萌发特性的遗传多样性

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摘要

Ten Agropyron desertorum genotypes originally collected from different areas of Iran with varying environmental conditions along with five different concentrations of NaCl solution were used to assess the genetic variation of germination attributes in this rangeland species. The set of accessions examined in this study showed considerable variation in all the germination attributes such as germination percentage and rate as well as seedling fresh and dry weights under salt stress. Principal component analysis revealed that four important principal components accounted for about 98.2 percent of the total variation among the traits studied. The first component comprises root length, plumule length, seedling length and seed vigor and accounted for 52.2 percent of the total variation among the traits. This component entitled as the seed germination ability. Cluster analysis classified the genotypes in four clusters. In conclusion, selection for the higher amounts of the traits root length, plumule length, seedling length and seed vigor can improve the seed germination ability in Agropyron desertorum genotypes. More over, crosses between the genotypes classified in the clusters 1 and 4 causes to broadening genetic variation and possibility of the efficient selection among the progenies exhausted from these crosses.
机译：最初从伊朗不同地区收集的具有不同环境条件的十种Agropyron desertorum基因型，以及五种不同浓度的NaCl溶液被用于评估该牧场物种发芽特性的遗传变异。在这项研究中检查的一组种质显示，在盐胁迫下，所有发芽特性（例如，发芽率和发芽率以及幼苗的鲜重和干重）均存在相当大的差异。主成分分析表明，四个主要主成分约占所研究性状总变异的98.2％。第一个组成部分包括根长，幼果长，幼苗长和种子活力，占性状总变异的52.2％。该成分称为种子发芽能力。聚类分析将基因型分为四个聚类。综上所述，选择较高数量性状的根长，幼果长，幼苗长和种子活力可以提高Agropyron desertorum基因型的种子发芽能力。而且，在聚类1和4中分类的基因型之间的杂交导致遗传变异的扩大和从这些杂交中耗尽的后代中有效选择的可能性。

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