显花植物自交不亲和性的分子与演化机制
Molecular and evolutionary mechanisms of self-incompatibility in angiosperms
赵洪 1薛勇彪1
作者信息
- 1. 中国科学院遗传与发育生物学研究所,北京 100101
- 折叠
摘要
自交不亲和性(self-incompatibility,SI)是雌雄同花植物广泛采取的一种种内促进异交机制,通常由一个多态且复等位的S位点控制.目前共发现 6 种不同分子机制的SI,包括由花柱S因子S-RNase和花粉S因子SLFs控制且常见于车前科、茄科、蔷薇科和芸香科的Ⅰ类、SRK和SCR控制的十字花科Ⅱ类、PrsS和PrpS控制的罂粟科Ⅲ类、CYP-GLO2-KFB-CCM-PUM控制的报春花科Ⅳ类、TsSPH1-TsYUC6-TsBAHD控制的时钟花科Ⅴ类及HPS10-S和DUF247I-S控制的禾本科Ⅵ类SI,其中Ⅰ类SI为异己识别体系,而Ⅱ、Ⅲ和Ⅳ类均为自己识别系统.此外,近年来对其起源和演化机制研究也取得显著进展.其中,Ⅰ类SI起源于真双子叶植物的最近共同祖先,Ⅱ～Ⅴ类则为丢失Ⅰ类后分别进化产生的新机制,而单子叶禾本科特有的Ⅵ类SI则可能是在丢失古老Ⅰ类SI后演化出的新系统.本文主要总结已报道SI的分子和演化机制,以期为显花植物SI的理论研究和育种应用提供参考和帮助.
Abstract
As an intraspecific outcrossing mechanism,self-incompatibility(SI)widely adopted by hermaphroditic plants is usually controlled by a polymorphic multi-allelic S locus.Typically,six molecular types of SI have been found,including type-Ⅰ controlled by the pistil S S-RNase and pollen S SLFs commonly spread in Plantaginaceae,Solanaceae,Rosaceae and Rutaceae,type-Ⅱ by SRK and SCR in Brassicaceae,type-Ⅲ by PrsS and PrpS in Papaveraceae,type-Ⅳ by CYP-GLO2-KFB-CCM-PUM in Primulaceae,type-Ⅴ by TsSPH1-TsYUC6-TsBAHD in Turneraceae and type-Ⅵ by HPS10-S and DUF247I-S in Poaceae,with type-Ⅰ characterized as a non-self recognition system but types-Ⅱ,-Ⅲ and-Ⅵ self ones.Furthermore,remarkable progresses have been made in their origin and evolutionary mechanisms recently.Among them,type-Ⅰ SI possessed a single origin in the most recent common ancestor of eudicots and types Ⅱ-Ⅴ dynamically evolved following its losses,while type-Ⅵ SI exclusively existed in monocot Poaceae may be regained after the loss of the ancient type-Ⅰ.Here,we mainly review the molecular and evolutionary mechanisms of angiosperm SI systems,thus providing a helpful reference for their theoretical research and breeding application.
关键词
显花植物/自交不亲和性/起源/演化/自交系/杂交育种Key words
angiosperms/self-incompatibility/origin/evolution/inbred lines/crossbreeding引用本文复制引用
基金项目
国家自然科学基金项目(32200273)
国家自然科学基金项目(32030007)
出版年
2024
NETL
NSTL
维普
万方数据