广泛的基因组进化使玉米在一个稳定的草族中脱而出
Michelle C Stitzer1, Arun S Seetharam2, Armin Scheben3
1Institute for Genomic Diversity, Cornell University, Ithaca, NY 14850 USA.
bioRxiv : the preprint server for biology
|February 3, 2025
概括
像玉米这样的草中的多重构体具有进化优势,但具有细胞挑战. 这项研究揭示了多倍积分的多种基因组结果,影响了重要的草种的基因调节和进化.
科学领域:
- 植物基因组学 植物基因组学
- 进化生物学是进化的生物学.
- 分子遗传学 分子遗传学
背景情况:
- 安德罗波戈尼亚草族主导着全球土地,包括玉米等重要作物.
- 多重积分,在Andropogoneae中很常见,提供了进化上的好处,但复杂化了细胞过程.
- 之前的多倍体性基因组研究受限于稀疏的分类型采样.
研究的目的:
- 为了研究多倍积分在Andropogoneae部落的多种基因组后果.
- 为关键的玉米亲属提供染色体规模的基因组组件.
- 挑战关于多体的进化影响的简单预测.
主要方法:
- 产生了来自27个Andropogoneae物种的33个基因组组合.
- 为Zea和Tripsacum创建了染色体规模的组件.
- 分析了染色体数,基因分离和可转移元素放大的模式.
主要成果:
- 在Zea.属中观察到预期的多体育后效应 (染色体数量减少,基因分离,TE扩张).
- 确定了12个具有显著不同结果的多重积分事件:保留的染色体数量,完整的重复基因组和随机TE放大.
- 在Andropogoneae群体中证明了对多倍体的可变基因组反应.
结论:
- 多体的进化结果比以前所认为的更加多样化.
- 这些发现为了解多多体种在草的进化和化中的作用提供了基础.
- 这项研究强调了广泛的分类样本采集在多化研究中的重要性.
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