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在西瓜的花期和水果产量的遗传控制

Dennis N Katuuramu¹, Amnon Levi¹, William P Wechter¹

¹U.S. Vegetable Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Charleston, SC, United States.

Frontiers in plant science

|October 26, 2023

概括

这项研究确定了西瓜的开花时间和水果产量的关键遗传区域. 研究结果支持培育努力,以改善这些重要的作物特征.

科学领域:

植物遗传学植物遗传学
提高作物质量提高作物质量
基因组学就是基因组学.

背景情况:

花开时间和水果产量对于西瓜 (Citrullus lanatus) 作物改善至关重要.
关于这些特征的遗传控制的信息有限,特别是在西瓜 (Citrullus lanatus var. 化物) 的存在.

研究的目的:

为了研究遗传和识别与花开时间和瓜水果产量相关的基因组位点.
为了为西瓜的标记器辅助育种提供基础.

主要方法:

全基因组关联研究 (GWAS) 在125个西瓜加入.
全基因组重新排序产生超过200万个单核酸多态 (SNP) 标记.
在两个季节的实地试验中,评估了开花时间 (男性/女性花数天) 和水果产量组件 (水果数量,重量,产量).

主要成果:

对于所有评估的特征,中等到高的广义遗传性.
在多个染色体中确定了重要的标记特征关联,用于开花时间,果实数,果实重量和果实产量.
由显著SNP解释的表型变异范围从1.6%到25.4%,表明复杂的遗传结构.
与开花和水果产量相关的候选基因在染色体Ca02,Ca04,Ca05,Ca06,Ca09和Ca11上被确定.

结论:

通过繁殖,在西瓜中改善花期和水果产量的基因是可行的.
GWAS成功地确定了影响这些重要的农学特征的基因组区域和候选基因.
这些发现为未来的西瓜育种计划提供了宝贵的遗传资源,旨在提高作物生产率.

关键词:

开花时间开花时间果子产量组件果子产量组件全基因组关联分析分析.标记-特征关联标记-特征关联瓜子水瓜子

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