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从基因组的角度来看,Capsella bursa-pastoris的起源和多样性

Aleksey A Penin¹, Artem S Kasianov², Anna V Klepikova²

¹Institute for Information Transmission Problems of the Russian Academy of Sciences, Moscow, Russia. alekseypenin@gmail.com.

|March 4, 2024

概括

测序了Capsella bursa-pastoris的基因组,这是一种多重体育的模型,揭示了主要是没有主导性的直线子基因组. 一个关键的同源交换事件指向了该物种的单一起源.

科学领域:

植物基因组学植物基因组学
多体的进化是多体的进化.
杂草生物学杂草生物学

背景情况:

卡普塞拉 (Capsella bursa-pastoris) 是一种快速生长的一年一度的杂交来源的杂草,对研究多体化有价值.
它作为模型生物的实用性受到缺乏参考基因组序列的限制.

研究的目的:

创建一个子基因组解析,染色体尺度组合和Capsella bursa-pastoris基因组的遗传图.
为了研究基因组结构,基因分布和C. bursa-pastoris.的进化事件.

主要方法:

染色体规模的基因组组装和遗传映射.
亚基因组意识注释和比较基因组学.
对多个C. bursa-pastoris和相关物种样本进行全基因组分析.

主要成果:

产生了一个基本上是对齐的亚基因组组,没有重大删除,插入或重新排列.
这两个亚基因组表现出相似的基因数,表明缺乏基因组主导地位.
染色体之间的同源交换导致了两种混合染色体,在不同的种群中发现,表明单一的起源事件.

结论:

囊-牧羊缺乏基因组优势,两种亚基因组均为基因贡献.
在所有种群中存在的早期同源交换事件支持该物种的单一起源.
全基因组数据挑战了C. grandiflora/rubella的直接祖先作用,表明这是一个已经灭绝的姐妹物种.

关键词:

卡普塞拉布尔萨-帕斯托里斯 (Capsella bursa-pastoris) 是一种植物.多多多多多多多多多多多多多多多染色体尺度组合组件的组合遗传多样性遗传多样性基因组组装组的基因组组装组基因组的演变基因组的演变

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