耳朵特征的基因架构基于协会映射和共同表达网络在玉米的杂交品种和杂交品种
Ting Li1,2, Haoxiang Yang1,2, Xiaojun Zhang1,2
1The Key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, College of Agronomy, Northwest A&F University, Yangling, 712100 Shaanxi China.
Molecular breeding : new strategies in plant improvement
|November 6, 2023
概括
这项研究使用全基因组关联研究确定了控制玉米耳朵特征的关键基因,无论是在内杂线和杂交品种中. 这些发现为改善玉米谷物产量提供了宝贵的见解.
科学领域:
- 植物遗传学 植物遗传学
- 农业科学 农业科学
- 分子生物学分子生物学
背景情况:
- 耳朵的特征显著影响玉米的谷物产量,但它们在杂交品种和杂交品种中的遗传基础尚未完全理解.
- 识别耳朵特征的候选基因对于提高玉米生产率至关重要.
研究的目的:
- 为了确定与玉米六个关键耳朵特征相关的候选基因.
- 探索耳朵特征的遗传结构,无论是在内杂线和杂交线.
- 提供基因资源,以改善玉米耳的发展和谷物产量.
主要方法:
- 雇佣了两个协会小组:203个杂交品种 (IP) 和246个F1杂交品种 (HP).
- 在多个环境中进行全基因组关联研究 (GWAS).
- 综合基因共同表达网络分析与GWAS结果预测候选基因.
主要成果:
- 在IP中确定了101个显著的SNP,在HP中确定了228个与六个耳朵特征相关的SNP.
- 预测了IP中的186个候选基因和HP中的440个候选基因,包括已知的ids1和sid1等基因.
- 发现了九个共同的候选基因,表达在耳朵和尖细胞组织中,其中两个关键基因 (GRMZM2G143330,GRMZM2G171139) 在另一组中得到验证.
结论:
- 进步了解杂交线与杂交线中玉米耳朵特征的遗传基础.
- 强调了杂交品种中主导和过度主导效应的重要性.
- 为未来的玉米育种计划提供了有价值的候选基因资源,旨在提高产量.
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