结构变异推动了根茎创新和姐妹Medicago物种的适应差异
Hongyin Hu1, Shuang Wu1, Yudan Zheng1
1State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, 73000, China.
Journal of integrative plant biology
|November 26, 2025
概括
结构变化驱动野生属的适应. 基因重复和非编码DNA的调节性变化解释了根茎形成和耐压力的差异,有助于料改善.
科学领域:
- 基因组学就是基因组学.
- 植物生物学 植物生物学
- 进化生物学 进化生物学
背景情况:
- 野生多年生姐妹物种 *Medicago archiducis-nicolai* (树类/高山类) 和 *M. ruthenica* (非树类/类) 是改善料的关键遗传资源.
- 了解它们对抗特征和息地适应的基因组基础对于作物育种至关重要.
研究的目的:
- 为了研究根茎形成的基因组基础和适应阿尔卑斯山/xeric环境在姐妹 * Medicago * 种类.
- 确定结构变异 (SVs) 在表型创新和生态专业化中的作用.
主要方法:
- 染色体规模基因组组合的生成.
- 对128个个体进行了重新测序.
- 在冷/热应力下转录基因组配置.
- 因果等位基因的功能验证.
主要成果:
- 结构变异,特别是基因重复,是根茎形成和适应高山/树息地的关键驱动因素.
- 在非编码的调节区域中,存在-缺席 SVs (PAVs) 影响异位基因特异性表达,影响根茎发育和应激反应.
- 调节性PAV在特征发育和应激适应过程中诱导不同的表达模式.
结论:
- 涉及编码和监管SVs的双重机制在这些姐妹物种中协调了表型创新和生态专业化.
- 这项研究为豆类进化研究和子育种提供了宝贵的基因组资源.
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