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在B. carinata获得的B. juncea入侵线上剖析QTL赋予干旱耐受性

Omkar Maharudra Limbalkar^1,2, Prashant Vasisth¹, Guman Singh³

¹Division of Genetics, Indian Council of Agricultural Research (ICAR)-Indian Agricultural Research Institute, New Delhi, India.

BMC plant biology

|December 22, 2023

概括

通过从B. carinata获得的内进线开发耐旱的印度子 (Brassica juncea) 显著提高了产量. B. carinata为改善干旱耐受性和利用水的效率提供了关键的基因组细分.

科学领域:

植物遗传学和育种.
农业学是一种农业学.
压力生理学压力生理学

背景情况:

干旱是一个主要的非生物压力,限制了作物生产率,特别是在雨季印度子 (Brassica juncea) 种植中.
开发耐旱品种对于在不断变化的气候条件下确保粮食安全至关重要.

研究的目的:

通过从B. carinata. 引入基因组段来开发耐旱的Brassica juncea基因型.
确定与干旱耐受性相关的定量特征基因 (QTL) 和候选基因.

主要方法:

87个B. juncea从B. carinata的内进线 (IL) 的发展.
在三个环境下,在雨水和灌条件下,对种子产量和相关特征的ILs的评估.
基因型测序 (GBS) 用于链接地图构建和QTL分析.

主要成果:

建立了一个连接地图,其中包含了5,165个SNP标记.
确定了29个干旱耐受性的附加QTL,其中17个是由B. carinata贡献的,主要是在B基因组上.
确定了8个QTL热点和17个与耐压力相关的候选基因.

结论:

B. carinata通过内侵入,在印度中显著促进干旱耐受性和水利用效率 (WUE).
该研究提供了对耐旱性遗传结构的见解,促进了改良子品种的发展.

关键词:

布拉西卡卡里纳塔 (Brassica carinata) 是一种植物.干旱耐受性指数的指数印度子印度子跨种类杂交化跨种类杂交化这是一个QTL热点.使用水的效率提高了水的使用效率.

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