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多部位基因组广泛关联研究揭示了地瓜新鲜种子休眠期的遗传学

Deekshitha Bomireddy^1,2, Vinay Sharma¹, Sunil S Gangurde¹

¹Center of Excellence in Genomics & Systems Biology (CEGSB) and Centre for Pre-breeding Research (CPBR), International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, 502324, India.

BMC plant biology

|December 26, 2024

概括

培育14-21天新鲜种子休眠期 (FSD) 的地瓜可以减少产量损失. 这项研究确定了显著的SNP特征关联和FSD候选基因,为改善的花生品种提供了标记.

科学领域:

农业科学农业科学
遗传学遗传学是一种遗传学.
植物育种植物育种

背景情况:

在花生中,采摘前发芽 (PHS) 会导致大量的产量和质量损失.
开发具有14-21天新鲜种子休眠期 (FSD) 的地瓜品种对于缓解这些问题至关重要.

研究的目的:

为了确定与花生新鲜种子休眠 (FSD) 相关的遗传基因和候选基因.
开发用于标记器辅助选择 (MAS) 的分子标记物,以改善地瓜中的FSD.

主要方法:

在地瓜迷你核心集合上使用多位点和单位点全基因组关联研究 (GWAS).
使用多季节表型和Axiom_Arachis基因型数据 (58K).
在显著的SNP特征协会 (STAs) 中进行了候选基因挖掘.

主要成果:

使用ML-GWAS在九个染色体中检测到FSD的9个显著的STA.
使用SL-GWAS在14个染色体中识别了38个STA.
发现了9个高可信度候选基因,涉及到调节休眠状态的阿布西西酸/吉伯酸信号通路.

结论:

确定了关键的遗传区域和候选基因,这些基因调节了花生种子的休眠状态.
在标记器辅助选择 (MAS) 中潜在使用的经过验证的等位基特定标记物.
提供了宝贵的遗传资源,用于培育具有增强新鲜种子休眠性的地瓜品种.

关键词:

协会映射协会映射协会映射协会映射候选基因是一个候选基因.诊断标记物诊断标记物诊断标记物分子机制的分子机制种子休眠状态种子休眠状态种子在现场发芽.

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