Haitian coffee agroforestry systems harbor complex arabica variety mixtures and underrecognized genetic diversity

Millet Claude Patrick, Allinne Clémentine, Vi Tram, Marraccini Pierre, Verleysen Lauren, Couderc Marie, Ruttink Tom, Zhang Dapeng, Solano Sânchez W., Tranchant-Dubreuil Christine, Jeune Wesly, Poncet Valérie. 2024. Haitian coffee agroforestry systems harbor complex arabica variety mixtures and underrecognized genetic diversity. PloS One, 19 (4):e0299493, 24 p.

https://doi.org/10.1371/journal.pone.0299493

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Url - jeu de données - Entrepôt autre : https://doi.org/10.23708/T6YZML

Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie; Staps

Résumé : Though facing significant challenges, coffee (Coffea arabica) grown in Haitian agroforestry systems are important contributors to rural livelihoods and provide several ecosystem services. However, little is known about their genetic diversity and the variety mixtures used. In light of this, there is a need to characterize Haitian coffee diversity to help inform revitalization of this sector. We sampled 28 diverse farms in historically important coffee growing regions of northern and southern Haiti. We performed KASP-genotyping of SNP markers and HiPlex multiplex amplicon sequencing for haplotype calling on our samples, as well as several Ethiopian and commercial accessions from international collections. This allowed us to assign Haitian samples to varietal groups. Our analyses revealed considerable genetic diversity in Haitian farms, higher in fact than many farmers realized. Notably, genetic structure analyses revealed the presence of clusters related to Typica, Bourbon, and Catimor groups, another group that was not represented in our reference accession panel, and several admixed individuals. Across the study areas, we found both mixed-variety farms and monovarietal farms with the historical and traditional Typica variety. This study is, to our knowledge, the first to genetically characterize Haitian C. arabica variety mixtures, and report the limited cultivation of C. canephora (Robusta coffee) in the study area. Our results show that some coffee farms are repositories of historical, widely-abandoned varieties while others are generators of new diversity through genetic mixing.

Mots-clés Agrovoc : Coffea arabica, Coffea canephora, variation génétique, agroforesterie, marqueur génétique, variété, services écosystémiques, distribution géographique, identification, Coffea, Coffea eugenioides, polymorphisme à nucléotide unique, anatomie végétale, phénotype

Mots-clés géographiques Agrovoc : Haïti

Mots-clés libres : Coffea arabica, Genetic diversity, Farms, Single nucleotide polymorphisms, Genotyping, Genetics, Crop genetic, Conservation genetics, Haplotypes, Haïti

Classification Agris : F30 - Génétique et amélioration des plantes
F08 - Systèmes et modes de culture

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Agences de financement hors UE : Banque Interaméricaine de Développement, Global Agriculture and Food Security Program, International Fund for Agricultural Development, Haitian Government

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