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Nature Plants:猕猴桃新性染色体的反复演化

已有 1592 次阅读 2023-3-10 23:00 |个人分类:每日摘要|系统分类:论文交流

Recurrent neo-sex chromosome evolution in kiwifruit

第一作者Takashi Akagi

第一单位冈山大学

通讯作者Takashi Akagi


 ABSTRACT 

背景回顾Sex chromosome evolution is thought to be tightly associated with the acquisition and maintenance of sexual dimorphisms. Plant sex chromosomes have evolved independently in many lineages and can provide a powerful comparative framework to study this. 


主要发现We assembled and annotated genome sequences of three kiwifruit species (genus Actinidia) and uncovered recurrent sex chromosome turnovers in multiple lineages. 


结果1-性染色体演化Specifically, we observed structural evolution of the neo-Y chromosomes, which was driven via rapid bursts of transposable element insertions. Surprisingly, sexual dimorphisms were conserved in the different species studied, despite the fact that the partially sex-linked genes differ between them. 


结果2-单基因控制Using gene editing in kiwifruit, we demonstrated that one of the two Y-chromosome-encoded sex-determining genes, Shy Girl, shows pleiotropic effects that can explain the conserved sexual dimorphisms. 


结论These plant sex chromosomes therefore maintain sexual dimorphisms through the conservation of a single gene, without a process involving interactions between separate sex-determining genes and genes for sexually dimorphic traits.

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 摘 要 

性染色体演化被认为与性别二态性的获取和维持息息相关。植物性染色体已经在许多谱系中独立演化,为针对这一问题的研究提供了理想材料。本文中,作者组装并注释了三个猕猴桃的基因组,发现了性染色体在多个谱系中反复翻转。其中,作者在新形成的Y染色体上观察到了结构演化,主要是由快速的转座元件插入的爆发所驱动。有趣的是,性别二态性在所研究的植物中是保守的,尽管他们之间性别连锁的基因部分不同。利用猕猴桃基因编辑技术,作者发现两个Y染色体上编码的性别决定基因其中之一,即Shy Girl表现出多效性功能,能够解释保守的性别二态性。因此,通过单个基因的保守性来维持这些植物的性染色体,而不涉及不同性别决定基因以及性别二态性状基因之间的相互作用。




** Takashi Akagi **


个人简介:2011年,京都大学,博士。


研究方向:植物性别决定。


doi: https://doi.org/10.1038/s41477-023-01361-9


Journal: Nature Plants

Published date: March 06, 2023


Cite:
Takashi Akagi, Erika Varkonyi-Gasic, Kenta Shirasawa, Andrew Catanach, Isabelle M. Henry, Daniel Mertten, Paul Datson, Kanae Masuda, Naoko Fujita, Eriko Kuwada, Koichiro Ushijima, Kenji Beppu, Andrew C. Allan, Deborah Charlesworth, Ikuo Kataoka. Recurrent neo-sex chromosome evolution in kiwifruit. Nature Plants, 2023. DOI: https://doi.org/10.1038/s41477-023-01361-9




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