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在多亲种群中鉴定与玉米北方叶病耐药性相关的候选基因

Yaqi Bi¹, Fuyan Jiang¹, Xingfu Yin¹

¹Institute of Food Crops, Yunnan Academy of Agricultural Sciences, Kunming, China.

Plant cell reports

|July 3, 2024

概括

研究人员确定了一种基因,Zm00001d014471,与热带玉米系YML226.2的北方叶病 (NLB) 耐药性有关. 这一发现支持用于开发NLB耐药玉米品种的标记辅助选择.

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:

北方叶病 (NLB) 对玉米产量构成重大威胁,导致大量的产量损失.
开发耐NLB的玉米品种对于有效的疾病管理和粮食安全至关重要.

研究的目的:

确定与玉米中抵抗北方叶病相关的遗传基因和候选基因.
用热带玉米系来研究特定候选基因在NLB耐药性中的作用.

主要方法:

在多亲玉米种群中利用定量特征位点 (QTL) 映射和全基因组关联研究 (GWAS).
分析了候选基因Zm00001d014471.1.的SNP变异和基因表达水平 (qRT-PCR).

主要成果:

一个主要的QTL (qtl_YML226_1) 和一个显著的SNP (5-49,193,921) 在与CATETO相关的玉米系YML226.1中共定位.
候选基因Zm00001d014471,编码一个五重复蛋白 (PPR) 蛋白,在YML226中表达更高,与NLB耐药性相关.
在YML226中的Zm00001d014471编码区域的特定SNP可能会导致其表达和抗性升高.

结论:

在热带玉米系YML226.6.1中确定了一种北方叶病耐药性的潜在候选基因 (Zm00001d014471).
这些发现为标记器辅助的选择提供了遗传基础,以开发具有增强NLB耐药性的改进玉米品种.

关键词:

齐亚梅斯 (Zea mays) 是一种植物.在CATETO的胚胎细胞质中.全基因组关联分析分析.多亲种群的多亲种群.北方叶虫病是北方叶虫病的一种.在 QTL 映射中使用 QTL 地图.

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