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Post-polyploidization centromere evolution in cotton

delete2025-03-03
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PRE
AI
Y
Yan Hu
J
Jinlei Han
S
Shangkun Jin
Z
Zegang Han
Z
Zhanfeng Si
S
Sunyi Yan
L
Lisha Xuan
G
Guangrun Yu
关
关雪莹 (Xueying Guan)
方
方磊 (Lei Fang)
王
王凯 (Kai Wang) *
T
Tianzhen Zhang *
DOI:10.1038/s41588-025-02115-3delete
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摘要

摘要

En 中文
陆地棉(Gossypium hirsutum)占全球棉花产量的90%以上,作为一种异源四倍体,是研究多倍体作物驯化的模式植物。在本研究中,我们报道了陆地棉品系Texas Marker-1(TM-1)的端粒到端粒(T2T)基因组组装结果(T2T-TM-1),其总大小为2,299.6 Mb,并注释了79,642个基因。基于T2T-TM-1,检测到A亚基因组与D亚基因组及其对应的二倍体亲本之间的种间着丝粒分化。着丝粒相关重复序列(CRCs)被发现富集于Gypsy-like反转录转座子。多倍体化后发生了着丝粒大小扩张、重定位和结构变异。有趣的是,CRC同源序列从二倍体D基因组亲本转移至D亚基因组,随后侵入A亚基因组,并在多倍体化后发生增殖。这表明D基因组亲本的CRCs具有进化优势,提出了多倍体化后D基因组特有的着丝粒重复序列遗传模式,并塑造了多倍体物种在多倍体化过程中的动态着丝粒景观。
Keyword:
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GENOME
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RETROTRANSPOSONS
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期刊

Nature Genetics 封面图
Nature Genetics
IF:
29
论文数:
758
被引数:
241

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