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米 (Oryza glumaepatula):一种野生相亲,可以提高栽培大米的干旱耐受性

Parthiban Thathapalli Prakash^1,2, Dmytro Chebotarov¹, Jianwei Zhang^3,4

¹Rice Breeding Innovations Department, International Rice Research Institute, UPLB Campus, Los Baños, Laguna 4031, Philippines.

Plant physiology

|September 4, 2023

概括

野生大米的亲属,Oryza glumaepatula,提供了宝贵的抗旱特性. 六个加入国家表现出优异的干旱耐受性,提供了关键的基因组定位点,用于改善栽培大米 (Oryza sativa) 适应气候变化.

科学领域:

植物遗传学和育种.
农业学是一种农业学.
适应气候变化适应气候变化

背景情况:

开发耐旱大米 (Oryza sativa) 对于粮食安全至关重要,特别是在受气候变化影响的雨水地区.
野生大米的亲属是识别新型干旱耐受性基因的重要资源.
野生AA基因组亲属Oryza glumaepatula被确定为抗干旱特征的有希望的候选者.

研究的目的:

为了选野生大米物种的抗旱能力.
为了确定具有增强干旱耐受性特征的特定O. glumaepatula加入.
确定与O. glumaepatula.干旱耐受性相关的基因组区域.

主要方法:

对22种野生树种的根生长和干旱反应进行比较分析.
在干旱压力下选69O. glumaepatula接口,以减少干燥重量,根深度和口腔密度.
对O. glumaepatula的全基因组再测序,以及对参考基因组的变异调用.

主要成果:

六个O. glumaepatula加入显示,与耐受O. sativa品种相比,干旱下减少了干燥减肥,增加了深根百分比和降低了口腔密度.
确定了多个基因组位点,与发芽干重,深根生长和口腔密度相关.
干旱耐受性加入在易洪水地区的起源表明洪水和干旱耐受性同时发生.

结论:

米 (Oryza glumaepatula) 是一个有价值的干旱耐受性来源,用于米的改良.
已识别的接入,特征和基因组位置可以促进干旱耐药性进入栽培大米 (Oryza sativa) 中.
这些发现有助于开发适应气候变化的米品种,以实现可持续农业.

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