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Updated: Jan 16, 2026

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哈普洛型解析的Populus lasiocarpa的端粒到端粒基因组组装揭示了反转移子驱动的中心分子进化

Tengfei Shen¹, Yihang Ning¹, Yaolin Wang¹

¹State Key Laboratory of Tree Genetics and Breeding, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China.

The Plant journal : for cell and molecular biology

|September 28, 2025

概括

在Populus lasiocarpa中的中间体被反转移子主导,而不是卫星DNA. 这项研究提出了一种新型的循环模型,用于以逆转移子和并联重复相互作用为驱动的中间体进化.

科学领域:

基因组学就是基因组学.
进化生物学进化生物学
分子生物学分子生物学

背景情况:

中介质对于染色体分离至关重要,但显示出高的进化变异性.
植物中间体通常以丰富的卫星DNA序列为特征.

研究的目的:

执行Populus lasiocarpa (PLAS) 的第一个哈普洛型解析基因组组.
使用CENH3 ChIP-Seq.精确地绘制PLAS中的所有功能性中间体.
研究PLAS中间体的序列组成和结构组织及其进化动态.

主要方法:

泰罗米尔到泰罗米尔基因组组装的人民.
使用CENH3 ChIP-Seq.进行中位素映射.
与Populus trichocarpa进行比较的基因组学.
对可转移元素 (TE) 和并联重复 (TR) 内容的分析.

主要成果:

在PLAS中位素中,缺乏丰富的卫星阵列,而是以逆转移子 (RLG和RIL元素) 为主.
复杂的嵌套TE数组扰乱了中心分子结构并推动了进化.
在P. trichocarpa中观察到一个保留的逆转移子主导的结构,尽管其序列保存率低.
提出了一个中心体进化的循环模型,涉及反转移子,表观遗传侵蚀,新中心体形成和KARMA介导的TR扩张.

结论:

中转质子是动态的,表观遗传性塑性域,由逆转子-TR对抗形成.
这挑战了传统的以卫星为中心的关于植物中位素进化的观点.
提供了对驱动植物基因组进化和中间体多样化的机制的新见解.

关键词:

在DNA甲基化过程中,人口的人民 (Populus Populus) 是一个中心海洋进化过程中的中心海洋.哈普洛型-已解析的基因组它们是逆转移子.

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