在玉米多环境GWAS中识别QTN,QTN与环境之间的相互作用,以确定植物高度和耳高度
Guoping Shu1, Aifang Wang1, Xingchuan Wang2,3
1Center of Biotechnology, Beijing Lantron Seed, LongPing High-tech Corp., Zhengzhou, Henan, China.
Frontiers in plant science
|December 14, 2023
概括
玉米植物和耳朵的高度受到基因型x环境相互作用的影响. 这项研究确定了许多定量特征核酸相互作用 (QTIN) 和QTIN x环境相互作用,揭示了这些重要的农学特征的遗传位置.
科学领域:
- 植物遗传学和育种.
- 定量遗传学 是一个量子遗传学.
- 农业科学 农业科学
背景情况:
- 植物高度 (PH) 和耳高度 (EH) 对于玉米生物质,沉积阻力和谷物产量至关重要.
- 基因型x环境相互作用 (GEI) 在玉米中显著影响PH和EH.
- 了解这些相互作用对于开发高产,有弹性的玉米品种至关重要.
研究的目的:
- 确定影响玉米PH和EH的定量特征核酸 (QTNs) 和QTNx环境相互作用 (QEIs).
- 分析GEI在不同中国玉米带的PH和EH的遗传结构.
- 提供关于玉米生长中的表型可塑性的遗传基础的见解.
主要方法:
- 在中国春夏玉米带的五个地区种植了203种玉米杂交品种.
- 收集PH和EH表型数据,使用GGE双图分析来定义大型环境.
- 使用多环境GWAS软件 (IIIVmrMLM) 拥有73,174个SNP来检测QEI和玉米带特定的QTN.
主要成果:
- 确定了PH的12个重要QEI和EH的11个,将效应分为Add*E和Dom*E组件.
- 检测到28个特定于玉米带的QTNs用于PH和25个用于EH.
- 对PH和EH进行注释的候选基因,包括特定的QEIs如saur76和mads32,以及sdg127和GLR3.4.4等QTN.
结论:
- 有相当多的基因位点导致玉米中的PH和EH GEIs.
- IIIVmrMLM对于发现具有显著QTN-by-环境相互作用的QTN是有效的.
- 这些发现提供了有价值的遗传资源,可以通过标记器辅助育种来提高玉米的适应性和产量.
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