G
Gregory A. Forbes
Researcher at International Potato Center
Publications - 72
Citations - 2501
Gregory A. Forbes is an academic researcher from International Potato Center. The author has contributed to research in topics: Phytophthora infestans & Blight. The author has an hindex of 28, co-authored 71 publications receiving 2187 citations. Previous affiliations of Gregory A. Forbes include University of Florida.
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Journal ArticleDOI
The Irish potato famine pathogen Phytophthora infestans originated in central Mexico rather than the Andes
Erica M. Goss,Javier F. Tabima,David E. L. Cooke,Silvia Restrepo,William E. Fry,Gregory A. Forbes,Valerie J. Fieland,Martha Cárdenas,Niklaus J. Grünwald +8 more
TL;DR: The hypothesis that populations found in the Andes are descendants of the Mexican populations and reconcile previous findings of ancestral variation in theAndes is supported, as well as the harnessing of plant disease resistance to manage late blight.
Journal ArticleDOI
Estimating the global severity of potato late blight with GIS-linked disease forecast models
TL;DR: Global severity of potato late blight was estimated by linking two disease forecast models, Blitecast and Simcast, to a climate data base in a geographic information system (GIS) and the average number of sprays was calculated by country, compared with estimates of current fungicide use.
Journal ArticleDOI
Population Genetic Structure of Phytophthora infestans in Ecuador.
Gregory A. Forbes,Ximena C. Escobar,Catalina C. Ayala,Jorge Revelo,M. E. Ordoñez,Barbara A. Fry,Katharine Doucett,William E. Fry +7 more
TL;DR: The population genetic structure of Phytophthora infestans in Ecuador was assessed and there was evidence for limited substructuring based on metalaxyl sensitivity and specific virulence, suggesting that EC-1 has been recently introduced to Ecuador.
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A Global Marker Database for Phytophthora infestans.
Gregory A. Forbes,Stephen B. Goodwin,Andre Drenth,Pedro J. Oyarzún,M. E. Ordoñez,William E. Fry +5 more
TL;DR: A marker database was compiled for isolates of the potato and tomato late blight pathogen, Phytophthora infestans, originating from 41 locations which include 31 countries plus 10 regions within Mexico, and seven new genotypes were identified and named.
Journal ArticleDOI
Stacking three late blight resistance genes from wild species directly into African highland potato varieties confers complete field resistance to local blight races
Marc Ghislain,Arinaitwe Abel Byarugaba,Eric Magembe,Anne Njoroge,Cristina Rivera,Maria Lupe Roman,Jose Carlos Tovar,S. Gamboa,Gregory A. Forbes,Jan Kreuze,Alex Barekye,A. Kiggundu +11 more
TL;DR: It is shown here that the transfer of three resistance (R) genes from wild relatives into potato provided complete resistance in the field over several seasons, and these late blight resistant potato varieties could be rapidly adopted and bring significant income to smallholder farmers in sub‐Saharan Africa.