Phylogenomic analysis clarifies the evolutionary origin of Coffea arabica  

作　　者：Yves Bawin Tom Ruttink Ariane Staelens Annelies Haegeman Piet Stoffelen Jean-Claude Ithe Mwanga Mwanga Isabel Roldan-Ruiz Olivier Honnay Steven B.Janssens 

机构地区：[1]Plant Sciences Unit,Flanders Research Institute for Agriculture,Fisheries,and Food(ILVO),Caritasstraat 39,Melle,BE-9090 Belgium [2]Plant Conservation and Population Biology,KU Leuven,Kasteelpark Arenberg 31,PO Box 2435,Leuven,BE-3001 Belgium [3]Crop Wild Relatives and Useful Plants,Meise Botanic Garden,Nieuwelaan 38,Meise,BE-1860 Belgium [4]Department of Plant Biotechnology and Bioinformatics,Ghent University,Technologiepark Zwijnaarde 71,Zwijnaarde,BE-9052 Belgium [5]Centre de Recherche en Sciences Naturelles(CRSN),Lwiro,D.S.Bukavu,South-Kivu Province,Democratic Republic of the Congo

出　　处：《Journal of Systematics and Evolution》2021年第5期953-963,共11页植物分类学报（英文版）

基　　金：valuable comments that improved the manuscript.This research was funded by Research Foundation-Flanders(FWO)(Project No.G056517N).

摘　　要：Interspecific hybridization events have played a major role in plant speciation,yet the evolutionary origin of hybrid species often remains enigmatic.Here,we inferred the evolutionary origin of the allotetraploid species Coffea arabica,which is widely cultivated for Arabica coffee production.We estimated genetic distances between C.arabica and all species that are known to be closely related to C.arabica using genotyping-by-sequencing(GBS)data.In addition,we reconstructed a time-calibrated multilabeled phylogenetic tree of 24 species to estimate the age of the C.arabica hybridization event.Ancestral states of self-compatibility were also inferred to shed new light on the evolution of self-compatibility in Coffea.Coffea canephora and C.eugenioides were confirmed as the putative progenitor species of C.arabica.These species most likely hybridized between 1.08 million and 543000 years ago,coinciding with periods of environmental upheaval,which may have induced range shifts of the progenitor species that facilitated the emergence of C.arabica.

关 键 词：ALLOPOLYPLOIDY Coffea arabica(Arabica coffee) SELF-COMPATIBILITY 

分 类 号：Q943.2[生物学—植物学]