Abstract
Coffea arabica, an allotetraploid hybrid of Coffea eugenioides and Coffea canephora, is the source of approximately 60% of coffee products worldwide, and its cultivated accessions have undergone several population bottlenecks. We present chromosome-level assemblies of a di-haploid C. arabica accession and modern representatives of its diploid progenitors, C. eugenioides and C. canephora. The three species exhibit largely conserved genome structures between diploid parents and descendant subgenomes, with no obvious global subgenome dominance. We find evidence for a founding polyploidy event 350,000–610,000 years ago, followed by several pre-domestication bottlenecks, resulting in narrow genetic variation. A split between wild accessions and cultivar progenitors occurred ~30.5 thousand years ago, followed by a period of migration between the two populations. Analysis of modern varieties, including lines historically introgressed with C. canephora, highlights their breeding histories and loci that may contribute to pathogen resistance, laying the groundwork for future genomics-based breeding of C. arabica.
Original language | English (US) |
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Pages (from-to) | 721-731 |
Number of pages | 11 |
Journal | Nature Genetics |
Volume | 56 |
Issue number | 4 |
DOIs | |
State | Published - Apr 2024 |
Funding
We acknowledge the Natural History Museum in London for providing a sample of the C. arabica lectotype. Funding was provided from the Academy of Finland (decisions 318288 and 329441) and a Nanyang Technological University start-up grant (J. Saloj\u00E4rvi); Ecos-Nord grant no. C21MA01 and STIC-AmSud grant no. 21-STIC-13 (R.G. and S.O.-A.); the Academy of Finland, grant no. 343656 (P.R.); NAPI Bioinform\u00E1tica from Funda\u00E7\u00E3o Arauc\u00E1ria and TELearning Project 2021\u201322 (grant no. 21-STIC-13) from STIC-AmSud (A.R.P.); Research Foundation \u2013 Flanders (FWO, grant no. G056517N) (Y.B.); the European Research Council (ERC) under the European Union\u2019s Horizon 2020 research and innovation program (grant no. 833522) and Ghent University (Methusalem funding, grant no. BOF.MET.2021.0005.01) (Y.V.d.P.); the Horizon Europe program, PRO-GRACE project (grant no. 101094738) (G.G.); INCT-Caf\u00E9-CNPq/Fapemig (A.A.); S\u00E3o Paulo State Research Foundation (FAPESP), grant nos. 2016/10896-0 and 2017/01455-2 (D.D. and S.M.C.L.); NSERC and the Canada Research Chairs programs (D.S.); the United States National Science Foundation grant nos. 1442190 and 2030871 (V.A.A.); and Nestl\u00E9 Research (P.D.). J. Saloj\u00E4rvi acknowledges the High Performance Computation Centre at NTU Singapore and University of Helsinki Linux administrators, as well as the CSC \u2013 IT Center for Science, Finland, for computational resources. R.G., P.H., E.C., C.T.D., V.P., A.d.K. and Unit\u00E9 Mixte de Recherche - Diversit\u00E9, adaptation, d\u00E9veloppement des plantes (UMR DIADE) are grateful to The French National Research Institute for Sustainable Development (IRD).
ASJC Scopus subject areas
- Genetics