基因组广泛关联研究和选择性扫描分析在土耳其冬季小麦生殖质中确定了与干旱下提高产量相关的基因
Deepmala Sehgal1,2, Nagenahalli Dharmegowda Rathan3, Fatih Özdemir4
1International Maize and Wheat Improvement Center (CIMMYT), Km. 45, Carretera Mex-Veracruz, El Batan, CP 56237, Veracruz, Mexico. deepmala.sehgal@syngenta.com.
Scientific reports
|April 10, 2024
概括
全基因组关联研究确定了与干旱和有利条件下的冬季小麦产量相关的基因组区域. 选择性扫描分析揭示了陆地品种的适应特征,有助于提高作物表现的育种.
科学领域:
- 植物遗传学和育种方法
- 农业科学 农业科学
- 基因组学就是基因组学.
背景情况:
- 冬季小麦陆地品种 (LR) 和现代品种 (MV) 进行了分析,以了解影响谷物产量的遗传因素.
- 了解与适应和产量改善相关的基因组区域对于小麦育种计划至关重要.
研究的目的:
- 在有利条件和干旱条件下确定与冬季小麦谷物产量增加相关的基因和基因组区域.
- 检测选择的签名,将陆地品种与现代品种区分开来,提供对适应和产量提升的见解.
主要方法:
- 全基因组关联研究 (GWAS) 使用一个由84种土耳其冬季小麦地产品种和73种现代品种组成的小组.
- 用25K小麦SNP阵列进行基因型化,并在两个生长季节 (干旱和有利条件) 进行农学特征的表型化.
- 选择性扫描分析以确定在陆地品种和现代品种之间进行选择的基因组区域.
主要成果:
- GWAS确定了与谷物产量和相关特征相关的18个基因组区域,接近已知的功能基因.
- 基于单元型的GWAS确定了五个具有有利单元型的区块,干旱季的产量增加了700多公斤/公.
- 选择性扫描分析检测到39个选择特征,包括控制开花,GY和调控元素的基因附近的区域.
结论:
- 该研究确定了在不同环境条件下对冬季小麦产量作出贡献的关键基因组区域和基因.
- 与基于SNP的GWAS相比,基于哈普类型的分析提供了更全面的遗传变异理解.
- 这些发现有助于在育种计划中利用陆地品种,以提高冬季小麦的适应性和提高产量.
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