1. Resistance to Phytophthora infestans in Solanum tuberosum landraces in Southern Chile
- Author
-
Jaime Solano, Florence Esnault, Philippe Brabant, Ivette Acuña, Escuela de Agronomia, Facultad de Recursos Naturales, Catholic University of Temuco, CRI Remehue, Instituto de Investigaciones Agropecuarias, Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Génétique Quantitative et Evolution - Le Moulon (Génétique Végétale) (GQE-Le Moulon), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11)-Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Institut National de la Recherche Agronomique (INRA)-Université Paris-Sud - Paris 11 (UP11)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
- Subjects
0106 biological sciences ,[SDV.SA]Life Sciences [q-bio]/Agricultural sciences ,Veterinary medicine ,Range (biology) ,late blight resistance ,Growing season ,01 natural sciences ,03 medical and health sciences ,genetic variability ,cultivars ,Blight ,pathogenicity ,Genetic variability ,Cultivar ,[SDV.MP.MYC]Life Sciences [q-bio]/Microbiology and Parasitology/Mycology ,potato germplasm ,030304 developmental biology ,2. Zero hunger ,0303 health sciences ,Resistance (ecology) ,biology ,relative area under disease progress curve (AUDPCr) ,fungi ,food and beverages ,stability ,Solanum tuberosum ,biology.organism_classification ,populations ,Agronomy ,Phytophthora infestans ,potato late blight ,010606 plant biology & botany - Abstract
International audience; The objective of this work was to evaluate the resistance of 30 Chilean potato landraces to natural infection by Phytophthora infestans during two growing seasons in Southern Chile. Control cultivars were 'Desiree', which has moderate susceptibility to late blight, and 'Karu', which is characterized by moderate resistance to the disease. The response of the potato landraces to late blight infection was assessed weekly by scoring the percentage of foliage destruction during the growing season. Subsequently, the relative area under the disease progress curve (AUDPCr) was calculated. A wide response variation was observed among the landraces during the occurrence of late blight. The comparative analysis of the AUDPCr showed that three landraces achieved high resistance to the disease (low AUDPCr values). These were UCT-34Cor (0.05), UCT-26Ach (0.06) and UCT-27Mu (0.10). Most of the potato landraces were classified into the range moderately resistant to moderately susceptible. The estimated values of heritabilities of the means were moderate to high for the joint analysis of the two years tested (0.65). The wide range of AUDPCr observed within potato landraces suggests the presence of partial resistance in response to the complex virulence pattern of the P. infestans populations present in Southern Chile.
- Published
- 2014
- Full Text
- View/download PDF