在Brachypodium distachyon对联合非生物应激反应的自然变异
Ella Ludwig1, Joshua Sumner1, Jeffrey Berry1,2
1Donald Danforth Plant Science Center, St. Louis, Missouri, 63132, USA.
The Plant journal : for cell and molecular biology
|July 24, 2023
概括
气候变化给植物带来了压力. 布拉基波迪亚分离体的加入显示了对干旱和高温的不同反应. 综合压力,而不是单独的压力,造成了最大的生物质损失,表明了复杂的植物压力相互作用.
科学领域:
- 植物科学 植物科学
- 遗传学 是一个遗传学.
- 气候变化生物学 气候变化生物学
背景情况:
- 由于气候变化,农业生产面临越来越多的挑战,包括全球气温上升和极端天气事件.
- 了解植物对非生物压力的反应对于开发弹性作物至关重要.
研究的目的:
- 在单个和联合干旱和热压力下调查Brachypodium distachyon加入的表型变异.
- 为了确定与Brachypodium distachyon中耐压力相关的遗传位置.
主要方法:
- 在干旱,热量和联合压力条件下对149个Brachypodium distachyon加入的表型评估.
- 全基因组关联研究 (GWAS) 旨在确定与压力诱导的表型变化相关的遗传位置.
主要成果:
- 热应激造成了最多的组织损伤;干旱和热应激的结合导致了最大的生物质减少.
- 参考线Bd21-0在压力下表现出不良增长,特别是干旱和热量相结合.
- 原产地气候与应激反应有显著的关联.
- GWAS确定了与植物高度和组织损伤相关的位置,一些近乎已知的应激反应基因.
- 与个人压力相关的遗传位置与组合压力没有显著相关.
结论:
- 布拉基波迪乌姆 (Brachypodium distachyon) 在对非生物压力的反应中表现出显著的表型变异.
- 对干旱和热应激的反应不仅仅是附加的,而且与个人应激反应不同.
- 与应激耐受性相关的遗传位置为改善作物对气候变化的抵抗力提供了目标.
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