Rapid evolution of T2/S-RNase genes in Fragaria linked to multiple transitions from self-incompatibility to self-compatibility

doi:10.1016/j.pld.2022.04.003

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	Rapid evolution of T2/S-RNase genes in Fragaria linked to multiple transitions from self-incompatibility to self-compatibility
	Chen,Wu; Wan,Hong; Liu,Fang; Du,Haiyuan; Zhang,Chengjun; Fan,Weishu; Zhu,Andan
	2023
发表期刊	PLANT DIVERSITY
ISSN	2468-2659
卷号	45 期号:2 页码:219-228
摘要	The T2/RNase gene family is widespread in eukaryotes, and particular members of this family play critical roles in the gametophytic self-incompatibility (GSI) system in plants. Wild diploid strawberry (Fragaria) species have diversified their sexual systems via self-incompatible and self-compatible traits, yet how these traits evolved in Fragaria remains elusive. By integrating the published and de novo assembled genomes and the newly generated RNA-seq data, members of the RNase T2 gene family were systematically identified in six Fragaria species, including three self-incompatible species (Fragaria nipponica, Fragaria nubicola, and Fragaria viridis) and three self-compatible species (Fragaria nilgerrensis, Fragaria vesca, and Fragaria iinumae). In total, 115 RNase T2 genes were identified in the six Fragaria genomes and can be classified into three classes (I-III) according to phylogenetic analysis. The identified RNase T2 genes could be divided into 22 homologous gene sets according to amino acid sequence similarity and phylogenetic and syntenic relationships. We found that extensive gene loss and pseudogenization coupled with small-scale duplications mainly accounted for variations in the RNase T2 gene numbers in Fragaria. Multiple copies of homologous genes were mainly generated from tandem and segmental duplication events. Furthermore, we newly identified five S-RNase genes in three self-incompatible Fragaria genomes, including two in F. nipponica, two in F. viridis, and one in F. nubicola, which fit for typical features of a pistil determinant, including highly pistil-specific expression, highly polymorphic proteins and alkaline isoelectric point (pI), while no S-RNase genes were found in all three selfcompatible Fragaria species. Surprisingly, these T2/S-RNase genes contain at least one large intron (>10 kb). This study revealed that the rapid evolution of T2/S-RNase genes within the Fragaria genus could be associated with its sexual mode, and repeated evolution of the self-compatible traits in Fragaria was convergent via losses of S-RNase. Copyright (c) 2022 Kunming Institute of Botany, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY
关键词	Fragaria RNase T2 Self-(in)compatibility S-RNase S-ALLELES RNASE RIBONUCLEASES GENOME PEAR ARABIDOPSIS DIVERSITY SEQUENCE IDENTIFICATION TRANSCRIPTOME
学科领域	Plant Sciences
DOI	10.1016/j.pld.2022.04.003
收录类别	SCI
WOS记录号	WOS:000973266800001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75387
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Chen,Wu,Wan,Hong,Liu,Fang,et al. Rapid evolution of T2/S-RNase genes in Fragaria linked to multiple transitions from self-incompatibility to self-compatibility[J]. PLANT DIVERSITY,2023,45(2):219-228.
APA	Chen,Wu.,Wan,Hong.,Liu,Fang.,Du,Haiyuan.,Zhang,Chengjun.,...&Zhu,Andan.(2023).Rapid evolution of T2/S-RNase genes in Fragaria linked to multiple transitions from self-incompatibility to self-compatibility.PLANT DIVERSITY,45(2),219-228.
MLA	Chen,Wu,et al."Rapid evolution of T2/S-RNase genes in Fragaria linked to multiple transitions from self-incompatibility to self-compatibility".PLANT DIVERSITY 45.2(2023):219-228.

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