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首页> 外文期刊>Critical Reviews in Plant Sciences >Identification of significant loci for drought resistance and root traits at seedling stage with a set of maize introgression lines
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Identification of significant loci for drought resistance and root traits at seedling stage with a set of maize introgression lines

机译：用一组玉米血液凝集线鉴定苗期抗旱性和根状性状的重要基因座

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摘要

Genetic dissection of the genetic basis of drought resistance is important for crop improvement. In this study, significant loci for drought resistance related traits at seedling stage were identified with a set of maize introgression lines under two environments. Two drought resistance indicators, leaf-drying degree under medium drought stress (LDM) and severe drought stress (LDS), and three root traits, root dry weight under drought stress (RWS), root length under drought stress (RLS), and root number under drought stress (RNS) were investigated. A total of 31 and 25 significant loci for LDM and LDS were identified, respectively, and 20 of them were commonly detected under both environments. For the three root traits, 41 significant loci were detected with 20 loci identified under both environments. Of the 97 significant loci, only 19 loci related to both leaf-drying degree and root traits under stress simultaneously, suggesting that these root traits had limited contribution to drought resistance at seedling stage. The significant loci detected in this study would be useful in molecular breeding for drought resistance in maize.
机译：干旱抵抗遗传基础的遗传解剖对于作物改善是重要的。在这项研究中，用两种环境下的一组玉米血栓引入线鉴定出幼苗阶段的抗旱性相关性状的重要基因座。两种干旱抗性指标，介质干旱胁迫（LDM）和严重干旱胁迫（LDS），以及三根权，在干旱胁迫下（RWS）下的根系干重，干旱胁迫（RLS）和根部调查了干旱胁迫下的数量（RNS）。总共31和25个显着的LDM和LDS的基因座分别被鉴定出来，并且在这两个环境中通常检测到其中20个。对于三个根特征，在两个环境下识别的20个基因座检测到41个重要的基因座。在97个重要的基因座中，同时应力下的叶片干燥度和根部特征有19个基因座，表明这些根部特征对幼苗阶段对抗旱性有限的贡献。本研究中检测到的显着基因座可用于玉米抗旱性的分子育种。

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  • 作者

    Feng Xiaomin; Li Wenzhen; Feng Yang; Hu Wei; Duan Lichao; Zhang Jianhua; Zhang Zuxin; Yue Bing;

  • 作者单位

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

    Huazhong Agr Univ Natl Key Lab Crop Genet Improvement Wuhan 430070 Hubei Province Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    introgression lines; drought resistance loci; root traits; seedling stage; maize;

    机译：渐蚀线;干旱抵抗基因座;根特征;幼苗阶段;玉米;

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