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在ZmNAC087的自然变异有助于在盐应激下对玉米苗的总根长度调节

Xiaomin Zhang^1,2, Houmiao Wang^3,4, Mengling Yang¹

¹State Key Laboratory of Crop Stress Adaptation and Improvement, Academy for Advanced Interdisciplinary Studies, School of Life Sciences, Henan University, Kaifeng, 475004, China.

BMC plant biology

|August 14, 2023

概括

研究人员确定了一个基因,ZmNAC087,在盐压力下对玉米根生长至关重要. 这种基因的变异,受化影响,增强了玉米的盐耐受性,为作物改进提供了新的遗传资源.

科学领域:

植物遗传学植物遗传学
农业学是一种农业学.
分子生物学分子生物学

背景情况:

土壤盐度是全球作物生产的主要威胁,损害了根部的发育和功能.
在压力下了解根系架构的遗传基础对于提高作物弹性至关重要.

研究的目的:

通过全基因组关联研究 (GWAS) 来确定控制盐应激下玉米总根长度 (TRL) 的遗传因素.
调查候选基因,特别是ZmNAC087在玉米盐耐受性中的作用.

主要方法:

在正常和盐应激条件下对玉米苗进行全基因组关联研究 (GWAS).
过渡式表达和事务化试验来描述ZmNAC087函数.
对促进体变异,基因表达,核酸多样性和玉米化过程中的选择进行分析.

主要成果:

确定了69个与38个影响TRL的候选基因相关的遗传变异.
在盐应激下,ZmNAC087中的显著单核酸多态 (SNP) 与TRL有关.
ZmNAC087编码了一个具有交换活性的核局部蛋白质,其促进体变异影响表达和盐调节的TRL.
ZmNAC087显示了玉米化和改良过程中的选择证据.

结论:

ZmNAC087的自然变异在玉米盐耐受性中起着关键作用.
有利的ZmNAC087等位基因有助于提高盐分耐受性.
这些发现为培育耐盐玉米品种提供了宝贵的遗传资源.

关键词:

化选择化选择玉米 (Zea mays) 是一个主要的农作物.自然变化的自然变化.盐的压力是盐的压力.根的总长度是根的总长度.ZmNAC08787 这是一个很好的例子.

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