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The biology of Phytophthora infestans at its center of origin

TitleThe biology of Phytophthora infestans at its center of origin
Publication TypeJournal Article
AuthorsGrünwald, NJ, Flier, WG
JournalAnnual Review of Phytopathology
broad-spectrum resistance, central mexico, coevolution, epidemiology, genetic differentiation, germplasm collecting expedition, interspecific hybridization, mont debary, nevado-de-toluca, potato late blight, potato late-blight, resistance, solanum-bulbocastanum, speciation, western slopes

The central highlands of Mexico are considered to be a center of genetic diversity for both the potato late blight pathogen and for tuber-bearing Solanum spp. Recent work conducted in Mexico and South America sheds new light on the biology and evolution of Phytophthora infestans and other related Phytophthora pathogens. It now appears that Mexican Solanum species, which coevolved with P. infestans and were previously known for providing a source of R-genes, also provide a source of quantitative, rate-reducing resistance that is highly effective, stable, and durable. It is now apparent that Mexico is the center of origin not only of the potato late blight pathogen P. infestans, but also of several related Phytophthora species including R mirabilis, P ipomoeae, and possibly P phaseoli. We close with the hypothesis that these Phytophthora species evolved sympatrically from one ancestral host through adaptive radiation onto their respective four host families.

Short TitleAnnu Rev Phytopathol
Citation Key182