Molecular and evolutionary mechanisms of self-incompatibility in angiosperms
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.
NETL
NSTL
万方数据
维普
