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发现西瓜皮肤颜色特征的遗传机制,使用精细映射和比较转录基因分析分析

Sitong Liu¹, Sikandar Amanullah², Bohan An¹

¹College of Life Science, Agriculture and Forestry, Qiqihar University, Qiqihar, China.

Frontiers in plant science

|April 4, 2025

概括

一个单一的主导基因,ClRC,控制西瓜皮肤的颜色,特别是深绿色的特征. 这种基因,Cla97C08G161570,通过全基因组测序识别,在色素发育中起着关键作用.

科学领域:

植物遗传学植物遗传学
水果的发展水果的发展
分子生物学分子生物学

背景情况:

水皮的颜色对于消费者接受至关重要.
影响皮肤颜色的遗传因素尚未得到充分了解.
了解这些因素可以改善育种策略.

研究的目的:

为了确定西瓜中深绿色皮肤颜色的遗传基础.
阐明调节皮肤色素的分子机制.
确定参与皮肤颜色发育的关键基因.

主要方法:

交叉分化的西瓜线 (K2Q和K2S) 来创建F2映射种群.
利用全基因组BSA测序 (BSA-seq) 和精细映射来定位负责的基因.
使用实时定量聚合酶链反应 (RT-qPCR) 和RNA测序用于基因表达分析.

主要成果:

鉴定了08号染色体上的一个主要遗传基因位点 (ClRC),由单个主导基因调节.
确定了候选基因Cla97C08G161570,编码甲基转移酶,具有特定的非同义SNP.
发现了940个与皮肤颜色相关的差异表达基因 (DEG),其中几个关键基因与Cla97C08G161570.0共享路径.

结论:

基因 Cla97C08G161570 是深绿色西瓜皮肤颜色的主要决定因素.
这个基因和相关途径基因显著调节色素活性.
这些发现为西瓜育种中寻求理想的皮肤颜色的标记器辅助选择提供了基础.

关键词:

2 - 植物-1 - 植物-1.4-β-纳夫托金甲基转移酶蛋白质精细地图绘制精细地图绘制皮肤颜色皮肤颜色皮肤颜色皮肤颜色转录组 (transcriptome) 是一个转录组.瓜子水瓜子

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