A comprehensive resource integrating genome assemblies, genetic diversity, molecular markers, breeding programs, QTL mapping, and phylogenetic analysis for Coffea arabica and Coffea canephora β from Ethiopia's center of origin to global germplasm collections.
Coffee genetic resources are the foundation for breeding disease-resistant, climate-resilient, and high-quality varieties essential for the sustainability of the global coffee industry.
Ethiopia, recognized as the center of origin for Coffea arabica, preserves approximately 99% of its wild genetic diversity [2][7][11]. This genetic heritage, combined with global germplasm collections and modern genomic tools, provides the resources needed to address challenges including coffee leaf rust, climate change, and evolving consumer preferences.
Our hub integrates cutting-edge research from 2024-2026 across six interconnected domains:
Without immediate, coordinated efforts to conserve and study remaining coffee genetic diversity, the industry risks being left defenseless against the combined onslaught of climate change, emerging pests and diseases, and shifting market requirements [2][7].
Six interconnected areas of coffee genetic and genomic research
since allotetraploid formation of C. arabica [1]
SNP loci identified (He=0.3014) [3][4][8]
markers in linkage map (3800 cM) [5][10]
resistance alleles in F2 population [6][9]
QTLs identified in C. canephora [7][10]
Coffea species across Africa, Asia, and islands [2][7]
Recent landmark studies in coffee genetics and genomics
98.6%
F2 population with resistance alleles to CLR and CBD; 29% pyramiding of 5 genes; 100% leaf miner resistance; 90% cercospora resistance [6][9]
View Details37,729 SNP loci
185 accessions; He=0.3014; Ο=0.1456; 98% disease resistance loci capture; 47 selective sweep regions [3][4][8]
View Details126 accessions
Congolese origin (group ER); admixtures from D, AG, OB groups; 45 core accessions maximizing diversity [1][7]
View Details45 markers
Open-access KASP SNP markers; 23 varieties authenticated; validated on 30,000+ samples across 6 countries [12]
View Details350-610k years
Chromosome-level assemblies; polyploidy event timing; split between wild/cultivar progenitors (30.5k years); conserved genome structure [1]
View Details848 markers
3800 cM map; 22 linkage groups; QTLs for yield, plant height, and bean size [5][10]
View DetailsFormation of allotetraploid Coffea arabica from hybridization of C. canephora and C. eugenioides [1]
Split between wild accessions and cultivar progenitors, followed by period of migration [1]
Domestication and selection in Yemen; origin of Bourbon and Typica [2][7]
First comprehensive SNP and Indel discovery in coffee [4]
848 SSR and SNP markers; 3800 cM map; yield, height, bean size QTLs [5][10]
45 SNP markers for variety authentication; open-access dataset [12]
Arabica genome assembly reveals diversification history [1]
37,729 SNP loci; 185 accessions; 98% disease resistance capture [3][4][8]
98.6% resistance alleles; 29% with 5 genes; 100% leaf miner resistance [6][9]
126 accessions; Congolese origin; 45 core accessions [1][7]
Open-access databases, germplasm collections, and bioinformatics tools
Global network of genebanks preserving coffee genetic diversity
952+
accessions; 185 RAD-seq validated [3][4][8]
4,000+
accessions; historic breeding material
2,000+
West African robusta diversity
4,000+
wild and cultivated landraces [11]
1,500+
Latin American collections
500+
wild Coffea species [12]
The genome and population genomics of allopolyploid Coffea arabica (2024). Nature Genetics [1]
Population structure and genetic diversity of a coffee germplasm collection in China (2025). Frontiers in Plant Science 16:1629553 [3][4][8]
Assessment of SNP markers for germplasm identification (2020). Frontiers in Plant Science 11:612593 [4]
Exploring the Genetic Potential for Multi-Resistance to Rust (2025). Plants 14(3):391 [6][9]
A genetic linkage map of coffee and QTL for yield, plant height, and bean size (2016). Tree Genetics & Genomes 12(1):5 [5][10]
The history and genetic diversity of cultivated Coffea arabica (2025). Advances in Botanical Research 114:1-28 [2][7]
Share your research data, access germplasm, or collaborate on coffee genetic improvement programs