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全基因组关联研究确定了在玉米 (Zea mays L.) 中涉及深播耐受性的定量特征位点和候选基因

Jin Yang¹, Zhou Liu¹, Yanbo Liu¹

¹State Key Laboratory of Crop Gene Resource Exploration and Utilization in Southwest China, Sichuan Agricultural University, Chengdu 611130, China.

Plants (Basel, Switzerland)

|June 19, 2024

概括

深度播种增强了在压力下玉米幼苗的出现. 研究人员确定了包括ZmGCP2在内的遗传因素,有助于深播耐受性,为改善玉米品种提供了潜力.

科学领域:

植物遗传学植物遗传学
农业科学农业科学
玉米育种玉米育种玉米育种

背景情况:

深度播种对于在干旱和低温等具有挑战性的环境中建立玉米苗木至关重要.
了解深播耐受性的遗传基础对于改善玉米种植至关重要.
与深层播种耐受性相关的关键特征包括 mesocotyl 长度, coleoptile 长度, plumule 长度,射出长度和初级根长度.

研究的目的:

确定与玉米深播耐受性特征相关的定量特征位置 (QTL).
调查与深播耐受性相关的特征的遗传基础.
确定可用于培育改良玉米品种的候选基因和等位基因变异.

主要方法:

全基因组关联研究 (GWAS) 在三个环境中对255个玉米杂交系进行了研究.
分析的特征包括 mesocotyl 长度 (ML), coleoptile 长度 (CL), plumule 长度 (PL),射长度 (SL) 和主要根长度 (PRL).
在已识别的QTL中进行候选基因分析,重点关注像ZmGCP2.2这样的基因.

主要成果:

分别为ML,CL,PL和SL确定了23个,6个,4个和4个QTL.
编码含有γ-氨酸的复杂蛋白质的基因ZmGCP2与ML,PL和SL显著相关.
丧失ZmGCP2的功能导致长 (PL) 减少,影响射长 (SL),可能是通过改变细胞延长.
优越的单质类型和ZmGCP2的等位基变异与较长的PL和SL有关.

结论:

ZmGCP2在调节梅花和芽长度方面发挥作用,有助于玉米的深播耐受性.
在ZmGCP2中识别的遗传变异为育种计划中的标记器辅助选择提供了宝贵的资源.
这项研究提供了对深播耐受性遗传结构的见解,为开发更有弹性的玉米品种铺平了道路.

关键词:

在 ZmGCP2 中使用.在深度播种时播种.全基因组关联研究研究.玉米玉米玉米是一种羽毛球的长度是多大的.定量特征的位置 (locus).射击长度射击长度射击长度

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