对玉米表型可塑性的基因组和环境决定因素的全面鉴定
Laura E Tibbs-Cortes1,2,3, Tingting Guo4,5, Carson M Andorf3,6
1Department of Agronomy, Iowa State University, Ames, Iowa 50011, USA.
Genome research
|September 13, 2024
概括
研究人员确定了影响玉米特征的关键环境因素. 基因组预测与这些因素相结合,准确地预测性能,揭示了这种重要作物的可塑性遗传位置.
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:
- 玉米 (Zea mays) 具有显著的表型可塑性,受遗传学和各种环境变量之间的复杂相互作用的影响.
- 识别控制特征变异的基因和理解它们在广的地理范围内对环境的反应仍然是玉米育种的重大挑战.
研究的目的:
- 系统地确定影响玉米19种特征的环境指数,包括开花时间,植物结构和产量组件.
- 利用高密度遗传标记和环境数据进行准确的特征预测,并剖析表型可塑性的遗传基础.
主要方法:
- 在11个不同的环境中对玉米嵌协会映射 (NAM) 种群的分析.
- 确定与日长,温度和湿度相关的环境指数.
- 从de novo测序中利用了超过2000万个SNP和SV标志物用于基因组预测和全基因组关联研究 (GWAS).
主要成果:
- 确定了影响玉米特征的具有生物意义的环境指数.
- 结合环境指数的基因组预测模型实现了准确的特征性能预测.
- 对于所有研究的特征,GWAS成功地检测出与塑性反应相关的遗传位置,以对已识别的环境因素作出反应.
结论:
- 这项研究提供了一个全面的框架和社区资源,通过整合环境和基因组数据来剖析和预测玉米的复杂特征.
- 这些发现提供了关于表型可塑性的遗传结构的见解,提出了一个连续模型,包括调节基因和等位基因敏感性机制.
- 这些结果有助于进一步研究不同环境的作物适应性和育种.
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