芝麻种质资源苗期耐盐性精准鉴定与种质发掘
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中国农业科学院油料作物研究所/农业农村部油料作物生物学与遗传育种重点实验室,武汉 430062

作者简介:

研究方向为芝麻种质资源,E-mail: 1009870502@qq.com

通讯作者:

张艳欣,研究方向为芝麻种质资源与遗传育种,E-mail:zhangyanxin@caas.cn
杨 力,研究方向为芝麻遗传育种,Email:yangli06@caas.cn

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基金项目:

国家特色油料产业技术体系(CARS-14); 农业农村部芝麻种质资源精准鉴定项目(19230672); 农业农村部油料作物种质资源安全保存项目(19230872); 科技部、财政部国家科技基础条件平台项目(NCGRC-2023-016)


Accurate Identification of Salt Tolerance in Sesame (Sesamum indicum L.) Germplasm Resources during Seedling Stage and Germplasm Exploration
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Affiliation:

Oil Crops Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Wuhan 430062

Fund Project:

Foundation projects: The Earmarked Fund for China Agricultrue Research System (CARS-14);Precision Identification Project of Sesame Germplasm Resources of Ministry of Agriculture and Rural Affairs(19230672);Safe Preservation Project of Oil Crop Germplasm Resources of Ministry of Agriculture and Rural Affairs(19230872);National Science and Technology Infrastructure Platform Project of the Ministry of Science and Technology and the Ministry of Finance(NCGRC-2023-016)

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    摘要:

    为推动芝麻耐盐碱育种进程,本研究通过建立一种精准高效的芝麻苗期耐盐性鉴定评价方法,并对239份材料进行苗期耐盐性鉴定以筛选极端材料。通过对28份耐盐性差异较大的品种进行试验,从苗期开始在不同浓度的NaCl溶液(0、70、140、210、280和350 mmol/L)中进行胁迫生长。经过3周处理后测定生长生理指标,确定最佳盐胁迫浓度为210 mmol/L ,关键指标为相对株高和相对鲜重。对D值与6个性状耐盐系数进行回归分析,得到回归方程:D=-0.171+1.081X1+0.253X2。以该回归方程对239份芝麻核心种质进行苗期耐盐性鉴定,共划分为高耐盐、耐盐、中度耐盐、盐敏感、高度盐敏感共5个等级,且筛选出了5份高耐盐种质和42份耐盐种质。通过对耐盐性鉴定结果与种质来源进行相关性分析,芝麻品种耐盐性与来源地的土壤盐渍化程度存在关联。本研究为芝麻耐盐品种选育提供了方法和材料基础。

    Abstract:

    To expedite the process of salt-tolerant sesame breeding, this research established a precise and highly efficient method for identifying and evaluating the salt tolerance of sesame seedlings and screened extreme materials by conducting salt tolerance identification on 239 materials at the seedling stage. Through experiments on 28 varieties with considerable differences in salt tolerance, the seedlings were subjected to stress growth in NaCl solutions of different concentrations (0, 70, 140, 210, 280, and 350 mmol/L) from the seedling stage. After three weeks of treatment, growth and physiological indicators were measured to determine the optimal concentration and key indicators, based on which the salt tolerance of 239 core germplasm was identified. The results indicated that the optimal stress concentration for identifying the salt tolerance of sesame seedlings was 210 mmol/L, and the core indicators were relative plant height and relative fresh weight. Regression analysis was conducted on the D value and the salt tolerance coefficients of six traits, and the regression equation was obtained: D = -0.171+1.081X1+0.253 X2. Using this regression equation to identify the salt tolerance of 239 sesame core germplasm during the seedling stage, they were classified into five grades: high salt tolerance, salt tolerance, moderate salt tolerance, salt sensitivity, and high salt sensitivity. Among them, 5 germplasm with high salt tolerance and 42 germplasm with salt tolerance were selected. Through conducting a correlation analysis between salt tolerance identification results and germplasm sources, it was discovered that the salt tolerance of sesame varieties is associated with the degree of soil salinization in their source regions. This research provides a methodological and material foundation for the breeding of salt-tolerant sesame varieties.

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章胤,高媛,黎冬华,等.芝麻种质资源苗期耐盐性精准鉴定与种质发掘[J].植物遗传资源学报,2024,25(12):2175-2186.

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  • 收稿日期:2024-04-22
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  • 在线发布日期: 2024-12-06
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