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Shweta Kalve¹, Megan Alexandra House¹, Bunyamin Tar'an¹

¹Department of Plant Sciences, University of Saskatchewan, Saskatoon, SK, Canada.

Frontiers in plant science

|February 20, 2024

概括

野生小豆的亲属表现出优越的耐受性,为改善作物弹性提供了宝贵的遗传资源. 这项研究确定了关键的基因和基因组区域,以提高豆育种计划中的抗性.

科学领域:

植物遗传学和育种.
植物生理学作物生理学
分子生物学分子生物学

背景情况:

小 (Cicer arietinum) 是一个重要的全球豆类作物.
寒冷压力显著阻碍了小的生长和产量,特别是在加拿大等生长周期短的地区.
野生小豆的亲属,如Cicer reticulatum,具有对低于最佳条件的固有耐受性,对于增强种植品种至关重要.

研究的目的:

评估野生豆亲属和种植品种的冷耐受性.
通过转录组分析,研究结耐受性背后的分子机制.
在跨物种交叉中识别与冷耐受性相关的定量特征位点 (QTL).

主要方法:

控制的冷压力实验对豆加入和品种进行.
结耐受性的表型评分在1-9级别上.
用于转录组分析的RNA测序 (mRNA) 来识别差异表达基因 (DEG).
基因本体学 (GO) 对DEGs的丰富分析.
用QTL-seq分析绘制与冷耐受性相关的基因组区域.

主要成果:

野生亲属,Kesen_075和CudiA_152,表现出明显更高的耐受性比易受的品种.
转录组分析显示,在结压力下,基因表达的实质性差异 (CDC Consul中的6,184个DEG,Kesen_075中的7,842个).
GO分析强调了耐受性加入中压力反应,刺激反应和光合作用相关基因的丰富.
在与冷耐受性相关的多个染色体上,QTL-seq确定了8个QTL (P<0.05) 和2个QTL (P<0.01).
发现58个DEG在已识别的QTL区域内共定位.

结论:

野生小豆的亲属是改善冷耐受性的宝贵基因来源.
不同的基因表达模式,特别是涉及CBF通路基因,有助于冷耐受性.
已识别的QTL和同位的DEG为耐寒小品种的标记器辅助育种提供了候选基因.
这项研究为豆适应结压力的遗传和分子基础提供了新的见解.

关键词:

在 QTL 测序中使用 QTL 测序.在RNA测序过程中,RNA测序无生物压力是无生物压力.寒冷的冷冷的冷冷的冷冷的冷冷的种植的小豆种植野生小豆是什么意思

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