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在玉米杂交品上对谷物的水分含量和脱水率进行全基因组关联分析

Yuan Dong¹, Zhi-Qian Feng¹, Fan Ye¹

¹Key Laboratory of Biology and Genetic Improvement of Maize in Arid Area of Northwest Region, College of Agronomy, Northwest A&F University, Yangling, Xianyang, 712100 Shaanxi China.

Molecular breeding : new strategies in plant improvement

|June 14, 2023

概括

研究人员确定了影响玉米杂交物中的谷物水含量 (GWC) 的遗传因素,这对于机械收获至关重要. 这项研究为改善农业实践提供了对具有较低GWC的育种玉米品种的见解.

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:

低谷物含水量 (GWC) 对于高效的机械化玉米生产至关重要.
在玉米杂交品种中GWC的遗传基础是复杂的,并未被充分理解.
了解GWC遗传学对于开发改进的玉米品种至关重要.

研究的目的:

在玉米杂交品种中进行全基因组关联分析 (GWAS) 检测GWC和谷物脱水率 (GDR).
确定控制GWC和GDR的遗传基因位点 (SNP) 和表观相互作用.
探索候选基因并识别玉米杂交系用于培育低GWC杂交.

主要方法:

在两个环境中利用了442个F1玉米植物的混合种群.
针对GWC进行了全基因组关联分析 (GWAS),并将干燥曲线下的面积 (AUDDC) 作为GDR的指数.
分析了已识别的单核酸多态 (SNP) 的添加和表观效应.

主要成果:

分别确定了19个和17个与GWC和AUDDC相关的显著SNP,其中10个是同局部的.
发现了GWC和AUDDC的64和77对表皮性SNP,解释了显著的表型变异.
选了398个和457个候选基因,包括那些在自和辅酶通路中的基因,并确定了五个潜在的近亲系,用于低GWC的繁殖.

结论:

添加剂和表观效应在控制玉米杂交品种GWC和GDR方面发挥着重要作用.
已识别的基因位置和候选基因为了解GWC遗传提供了基础.
这项研究为分析GWC遗传机制和培育低GWC玉米材料提供了有价值的参考资料.

关键词:

在GWAS中,GWAS就是GWAS.谷物脱水率谷物脱水率谷物中的水含量.混合动力是一个混合动力.玉米玉米玉米是一种

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