基因组区域的识别 赋予增强的和铁度 在小麦品种和从野生亲属衍生的入侵线
Irina N Leonova1, Antonina A Kiseleva1, Elena A Salina1
1The Federal Research Center, Institute of Cytology and Genetics SB RAS, Novosibirsk 630090, Russia.
International journal of molecular sciences
|October 16, 2024
概括
野生小麦的亲戚提供了改善谷物和铁含量的遗传见解. 研究人员确定了与这些矿物质相关的关键遗传位置,为增强小麦营养铺平了道路.
科学领域:
- 植物遗传学 植物遗传学
- 农业科学 农业科学
- 营养基因组学 营养基因组学
背景情况:
- 小麦的矿物成分对人类营养至关重要.
- 野生和栽培小麦的亲属为特征改进提供了宝贵的遗传资源.
- 了解谷物矿物积累的遗传基础对于培育生物强化小麦至关重要.
研究的目的:
- 为了确定与小麦的谷物度 (GZnC) 和谷物铁度 (GFeC) 相关的遗传位置.
- 探索野生亲属,特别是Timopheevi群对矿物质含量的遗传贡献.
- 确定参与小麦粒中和铁吸收和运输的候选基因.
主要方法:
- 利用一个小麦面板,包括现代品种,陆地品种和来自各种*Triticum*物种的内进线.
- 采用贝叶斯式lassolnference (BLINK) 模型进行全基因组关联研究 (GWAS).
- 分析了GZnC和GFeC的标记特征关联 (MTA),包括新的关联.
主要成果:
- 对GZnC和GFeC分别确定了31个和73个标记特征关联 (MTA),其中有19个新的关联.
- 发现GZnC的染色体1B,2A,2B,5A,5B和GFeC的染色体2A,2B,5D上有显著的MTA.
- 在2A和2B上发现了两个与GZnC和GFeC相关的SNP,主要是从*T. timopheevii*和*T. kiharae*遗传的.
结论:
- 来自*T. timopheevii*和*T. kiharae*的A和G基因组的遗传因素显著增加了谷物的和铁含量.
- 确定了可用于培育生物强化小麦的特定MTA和候选基因 (例如,转运器).
- 这项研究为了解和改进小麦中谷物矿物积累的遗传基础提供了基础.
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