Defeated Stacked Resistance Genes Induce a Delay in Disease Manifestation in the Pathosystem <i>Solanum tuberosum—Phytophthora infestans</i>
Abdelmoumen Taoutaou,
Ioana Virginia Berindean,
Miloud Khalil Chemmam,
Lyes Beninal,
Soumeya Rida,
Lakhdar Khelifi,
Zouaoui Bouznad,
Ionut Racz,
Andreea Ona,
Leon Muntean
Affiliations
Abdelmoumen Taoutaou
Laboratoire de Phytopathologie et Biologie Moléculaire, Département de Botanique, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Ioana Virginia Berindean
Department of Genetics, Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania
Miloud Khalil Chemmam
Laboratoire de Phytopathologie et Biologie Moléculaire, Département de Botanique, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Lyes Beninal
Laboratoire de Phytopathologie et Biologie Moléculaire, Département de Botanique, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Soumeya Rida
Laboratoire des Ressources Génétiques et Biotechnologies, Département de Productions Végétales, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Lakhdar Khelifi
Laboratoire des Ressources Génétiques et Biotechnologies, Département de Productions Végétales, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Zouaoui Bouznad
Laboratoire de Phytopathologie et Biologie Moléculaire, Département de Botanique, Ecole Nationale Supérieure Agronomique, Avenue Pasteur (ENSA-ES 1603), Hassan Badi, El-Harrach, Algiers 16200, Algeria
Ionut Racz
Department of Genetics, Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania
Andreea Ona
Department of Plant Breeding, Faculty of Agriculture, University of Agricultural Sciences and Veterinary, Medicine Cluj-Napoca, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania
Leon Muntean
Department of Plant Breeding, Faculty of Agriculture, University of Agricultural Sciences and Veterinary, Medicine Cluj-Napoca, Calea Manastur 3-5, 400372 Cluj-Napoca, Romania
Cultivated potato (Solanum tuberosum L.) is one of the most important crops worldwide. Phytophthora infestans (Mont.) de Bary is the oomycete pathogen responsible for the famous Irish famine (1840s). It is still the most important pathogen affecting potato crops, causing the late blight disease on potato and tomato. It is mainly controlled by fungicides. Breeding for disease resistance is the best alternative to chemical control of the disease. One of the strategies used is to stack many resistance genes in the same genotype. Here, we wanted to test the effect of the stacked resistance gene (R) from S. demissum on the infection process by the virulent race EU_13_A2. Four potato genotypes were tested, each one harboring, respectively, one, two, three or four R genes. All the tested genotypes were sensitive. However, the sensitivity degree was negatively correlated with the number of genes harbored by each genotype. There was a delay of two days of symptoms manifestation for the genotype with 4Rs, and the pathogen produced less spores on the detached leaf test. In addition, the amount of phenolic compounds produced is higher in the genotypes with multiple R genes.
