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  • The genome and population genomics of allopolyploid Coffea arabica reveal the diversification history of modern coffee cultivars
Title: The genome and population genomics of allopolyploid Coffea arabica reveal the diversification history of modern coffee cultivars
Abstract Coffea arabica, an allotetraploid hybrid ofCoffea eugenioidesandCoffea 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-haploidC. arabicaaccession and modern representatives of its diploid progenitors,C. eugenioidesandC. 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 withC. canephora, highlights their breeding histories and loci that may contribute to pathogen resistance, laying the groundwork for future genomics-based breeding ofC. arabica.  more » « less
Award ID(s):
2030871
PAR ID:
10636600
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more » ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publisher / Repository:
Springer-Nature
Date Published:
Journal Name:
Nature Genetics
Volume:
56
Issue:
4
ISSN:
1061-4036
Page Range / eLocation ID:
721 to 731
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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