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Variation in Genetic Diversity of Phytophthora infestans Populations in Mexico from the Center of Origin Outwards.
Shakya, Shankar K; Larsen, Meredith M; Cuenca-Condoy, Mercedes María; Lozoya-Saldaña, Héctor; Grünwald, Niklaus J.
Affiliation
  • Shakya SK; Department of Botany and Plant Pathology, Oregon State University, Corvallis, OR 97331.
  • Larsen MM; Horticultural Crops Research Unit, USDA-ARS, Corvallis, OR 97330.
  • Cuenca-Condoy MM; Departamento de Fitotecnia, Universidad Autónoma de Chapingo, Méx. 56230, México.
  • Lozoya-Saldaña H; Departamento de Fitotecnia, Universidad Autónoma de Chapingo, Méx. 56230, México.
  • Grünwald NJ; Horticultural Crops Research Unit, USDA-ARS, Corvallis, OR 97330.
Plant Dis ; 102(8): 1534-1540, 2018 Aug.
Article in En | MEDLINE | ID: mdl-30673430
The Toluca valley, located in central Mexico, is thought to be the center of origin of the potato late blight pathogen Phytophthora infestans. We characterized over 500 individuals of P. infestans sampled from populations with a geographical distance of more than 400 km in six regions adjacent to the Toluca valley in three states including Michoacán, Mexico, and Tlaxcala. Our sampling occurred on a predominant east to west gradient and showed significant genetic differentiation. The most western sampling location found in Michoacán was most differentiated from the other populations. Populations from San Gerónimo, Juchitepec, and Tlaxcala clustered together and appeared to be in linkage equilibrium. This work provides a finer understanding of gradients of genetic diversity in populations of P. infestans at the center of origin.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Genetic Variation / DNA, Fungal / Microsatellite Repeats / Phytophthora infestans Country/Region as subject: Mexico Language: En Journal: Plant Dis Year: 2018 Type: Article

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Genetic Variation / DNA, Fungal / Microsatellite Repeats / Phytophthora infestans Country/Region as subject: Mexico Language: En Journal: Plant Dis Year: 2018 Type: Article