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首页 > 过刊浏览>2025年第26卷第3期 >519-529. DOI:10.13430/j.cnki.jpgr.20240619001
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青稞种质资源抗旱性鉴定评价
作者:
作者单位:

青海大学农林科学院/青藏高原种质资源研究与利用实验室/青海省青稞遗传育种重点实验室/国家麦类 改良中心青海青稞分中心， 西宁810016

作者简介:

研究方向为青稞遗传育种，E-mail：15251892177@163.com

通讯作者:

吴昆仑，研究方向为青稞遗传育种，E-mail：wklqaaf@163.com

基金项目:

国家自然科学基金项目（32260456）；青海省自然科学青年基金（2023-ZJ-969Q）


Drought-Resistance Evaluation of Qingke Germplasm Resources
Author:
  • CUI Yongmei

    CUI Yongmei

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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  • LI Jie

    LI Jie

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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  • ZHANG Li

    ZHANG Li

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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  • YAO Youhua

    YAO Youhua

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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  • YAO Xiaohua

    YAO Xiaohua

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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  • WU Kunlun

    WU Kunlun

    Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016
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Affiliation:

Academy of Agricultural and Forestry Sciences， Qinghai University / Laboratory for Research and Utilization of Qinghai Tibet Plateau Germplasm Resources / Qinghai Key Laboratory of Hulless Barley Genetics and Breeding / Oinghai Hulless Barley Subcenter of National Triticeae Improvement Center， Xining 810016

Fund Project:

Foundation projects： National Natural Science Foundation of China （32260456）； Qinghai Provincial Natural Science Foundation for Young Scholars （2023-ZJ-969Q）

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    摘要:

    干旱是青藏高原地区影响青稞稳产增产的最主要逆境因子之一。鉴定青稞抗旱代表性种质资源、培育抗逆新品种，是提高青稞抗旱性的有效措施。本研究对由246份青稞种质组成的自然群体开展苗期与成株期抗旱性鉴定，系统分析了青稞种质资源不同发育阶段的抗旱性特征。在苗期通过相对离子渗漏率对群体抗旱性进行逐级分类；在成株期测定株高、穗长、单穗粒数、千粒重4个产量相关性状，利用多种分析方法综合评价成株期抗旱性，并建立了成株期抗旱性综合评价模型和筛选指标。结果表明，成株期干旱胁迫导致抗旱相关指标显著降低5.39%~18.87%，其中穗长对干旱胁迫最为敏感和显著相关。此外，4个成株期抗旱性状的种质间变异系数范围在11.98%~24.96%之间，说明不同种质间的抗旱性也存在明显差异。苗期和成株期分别鉴定到21份和36份极强抗旱或强抗旱材料，84份和71份极弱抗旱或弱抗旱材料。结合苗期和成株期抗旱性鉴定结果，共鉴定出3份均表现极强抗旱或强抗旱材料，26份均表现为极弱抗旱或弱抗旱材料。相关性分析表明，苗期的相对离子渗漏率和成株期的综合抗旱性评价D值之间相关性不显著。以上鉴定到的抗性材料，可为抗旱育种提供亲本材料，并为解析青稞关键生长时期抗旱作用机制提供基础研究材料。

    Abstract:

    Drought is one of significant environmental stresses in the Tibetan Plateau region. Breeding drought-tolerant varieties in Qingke （Tibetan hulless barley） is an effective strategy to enhance its drought resistance. In this study， we evaluated the drought resistance of 246 Qingke germplasm resources at both the seedling and reproductive stages. The drought resistance was classified by measuring relative electrolyte leakage at the seedling stage， and at the reproductive stage， plant height （PH）， spike length （SL）， kernels per ear （KN）， and thousand grain weight （TGW） were measured and analyzed. A comprehensive evaluation model （D-value） was developed to identify suitable evaluation indices for drought resistance. The results showed that drought stress resulted in a significant decrease of 5.39% to 18.87% in the four drought-related traits at the reproductive stage， with spike length being the most sensitive and significantly correlated with drought resistance. The coefficients of variation of these traits ranged from 11.98% to 24.96%， highlighting substantial variation in drought resistance among the germplasms. Specifically at the seedling and reproductive stages， 21 and 36 were identified as highly-resistant/resistant accessions， respectively， and 84 and 71 were identified as highly-sensitive/sensitive accessions， respectively. When combining the results from both stages， three accessions showed highly-resistant/resistant， and 26 accessions showed highly-sensitive/sensitive. However， there was no significant correlation between relative electrolyte leakage and the comprehensive evaluation D-value. Collectively， this study provides valuable germplasm resources for future breeding programs and deciphering the drought-tolerance mechanisms during critical growth periods of Qingke.

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崔永梅,李洁,张丽,等.青稞种质资源抗旱性鉴定评价[J].植物遗传资源学报,2025,26(3):519-529.

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  • 收稿日期:2024-06-19
  • 在线发布日期: 2025-03-07
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