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对利里奥登德龙的泛组分析揭示了与生长特征相关的存在/缺席变异

Hainan Wu^1,2, Siqi Chen^1,2, Jing Wang^1,2

¹State Key Laboratory of Tree Genetics and Breeding, Nanjing Forestry University, Nanjing, China.

BMC plant biology

|August 9, 2025

概括

基因存在/缺失变异 (PAV) 是植物多样性和繁殖的关键. 这项研究建立了Liriodendron泛基因组,确定了数千个基因,包括新的基因,并将PAV与杂交物中的生长特征和异构联系起来.

科学领域:

植物基因组学植物基因组学
人口遗传学人口遗传学
分子育种是一种分子育种.

背景情况:

基因存在/缺失变异 (PAV) 对于理解植物遗传多样性和特征发展至关重要,补充单核酸多态 (SNP).
在植物育种和特征阐明中PAV的作用需要进一步研究,特别是在经济上重要的物种中,如Liriodendron.

研究的目的:

构建一个全面的Liriodendron pangenome,并确定PAVs.
为了研究基因PAVs与混合Liriodendron的生长特征之间的关联.
探索PAVs对利里奥登德龙生长中的异构的贡献.

主要方法:

使用24个利里奥登德龙连接构建了潘格诺姆.
在247个利里奥登德龙基因型中通过重新测序数据分析识别PAV.
全基因组关联研究 (GWAS) 以将PAV与生长特征和异构联系起来.

主要成果:

一个Liriodendron pangenome被建立,揭示了116 Mb的非参考序列和32,773个基因,包括3,558个新基因.
确定了13,779个核心基因和18,179个可用基因,其中14个候选基因通过GWAS与生长特征相关.
发现PAVs在生长特征中显著促进异构,在杂交组织中显示主导表达模式.

结论:

这项研究扩大了Liriodendron的基因组资源,并确定了与生长特征相关的候选基因.
基因PAV是混合Liriodendron生长中异构的主要驱动因素,特定的基因表现出与混合活力相关的父母表达模式.
这项研究为Liriodendron异构的基因机制提供了宝贵的见解,这对标记器辅助育种有意义.

关键词:

在GWAS中,GWAS就是GWAS.增长的特征增长的特征异质化是一种异质化.杂交的丽里奥登德龙是一种混合的植物.存在/缺席变化的变化.

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