Title: Genetic variation and risks of introgression in the wild Coffea arabica gene pool in south-western Ethiopian montane rainforests
Authors: Aerts, Raf ×
Berecha, Gezahegn
Gijbels, Pieter
Hundera, Kitessa
Vandepitte, Katrien
Van Glabeke, Sabine
Muys, Bart
Roldan-Ruiz, Isabel
Honnay, Olivier #
Issue Date: Feb-2013
Publisher: Wiley-Blackwell Publishing, Inc
Series Title: Evolutionary Applications vol:6 issue:2 pages:243-252
Abstract: The montane rainforests of SW Ethiopia are the primary centre of diversity of Coffea arabica and the origin of all Arabica coffee cultivated worldwide. This wild gene pool is potentially threatened by forest fragmentation and degradation, and by introgressive hybridisation with locally improved coffee varieties. We genotyped 703 coffee shrubs from unmanaged and managed coffee populations, using 24 microsatellite loci. Additionally, we genotyped 90 individuals representing 23 Ethiopian cultivars resistant to Coffee Berry Disease (CBD). We determined population genetic diversity, genetic structure, and admixture of cultivar alleles in the in situ gene pool. We found strong genetic differentiation between managed and unmanaged coffee populations, but without significant differences in within-population genetic diversity. The widespread planting of coffee seedlings including CBD-resistant cultivars most likely offsets losses of genetic variation attributable to genetic drift and inbreeding. Mixing cultivars with original coffee genotypes, however, leaves ample opportunity for hybridisation and replacement of the original coffee gene pool, which already shows signs of admixture. In situ conservation of the wild gene pool of C. arabica must therefore focus on limiting coffee production in the remaining wild populations, as intensification threatens the genetic integrity of the gene pool by exposing wild genotypes to cultivars.
Description: Data archived in Dryad: DOI: 10.5061/
ISSN: 1752-4571
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division Forest, Nature and Landscape Research
Division of Crop Biotechnics
Ecology, Evolution and Biodiversity Conservation Section
× corresponding author
# (joint) last author

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Genetic variation and risks of introgression in the wild Coffea arabica gene pool.pdf Published 717KbAdobe PDFView/Open
EVA-2012-018-OA-R2-SupportingInformation.pdfSupporting information Published 152KbAdobe PDFView/Open
KNACK-20120815-64.pdfArticle summary in Knack 15/08/2012 Published 3866KbAdobe PDFView/Open
EVA-2012-018-OA-R2-RevisionNotes.pdfRevision notes 2 Published 106KbAdobe PDFView/Open Request a copy
EVA-2012-018-OA-R1-RevisionNotes.pdfRevision notes 1 Published 132KbAdobe PDFView/Open Request a copy
EVA-2012-008-Data.zipData files (also archived on Dryad) Published 1186KbUnknownView/Open
Aerts et al 2012 EVOL APPL.pdfOA article (without page numbers) Published 708KbAdobe PDFView/Open

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