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双模型GWAS分析和玉米花期时间相关特征的基因组选择

Zehui Fan¹, Shaohang Lin¹, Jiale Jiang¹

¹College of Agronomy, Xinjiang Agricultural University, Urumqi 830052, China.

|June 27, 2024

概括

玉米的开花时间对于作物的适应性至关重要. 这项研究使用GWAS和GS确定了花期特征的关键遗传标记,改进了育种策略.

科学领域:

植物遗传学植物遗传学
农业科学农业科学
农作物育种农作物育种

背景情况:

花期是玉米繁殖中生态适应性的关键选择特征.
了解花期的遗传基础对于开发改进的玉米品种至关重要.

研究的目的:

探索玉米中与开花时间相关的特征的遗传结构.
识别与开花时间相关的显著遗传标记和候选基因.
为了评估基因组选择 (GS) 对开花时间特征的有效性.

主要方法:

使用FarmCPU和BLINK模型对379个多亲DH系进行全基因组关联研究 (GWAS).
在不同的环境中,为天到 (DTT),天到花粉 (DTP) 和天到丝 (DTS) 的表型化.
基因组选择 (GS) 分析以评估预测准确性.

主要成果:

对于DTT (82.75%),DTP (86.09%) 和DTS (85.26%) 的高遗传率.
GWAS在染色体1,3,8,9和10上发现了显著的单核酸多态 (SNP).
三种SNP表现出类效应,表明DTT,DTP和DTS之间存在遗传相关性. 检测到了24个候选基因.
通过100个显著的SNP,GS实现了高预测准确度,最佳训练人群规模为70%.

结论:

这项研究提高了对玉米开花时间遗传基础的理解.
确定了重要的SNP和候选基因,为玉米育种提供了宝贵的资源.
这些发现为玉米开花时间的改善提供了基因组选择的优化策略.

关键词:

候选基因是指候选基因的基因.开花时间开花时间全基因组关联分析分析.基因组选择基因组选择玉米玉米玉米是一种预测的准确性预测的准确性

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