The root-knot nematode resistanceN-gene co-localizes in theMe-genes cluster on the pepper (Capsicum annuumL.) P9 chromosome

Autor: Bao Xi Zhang, Alain Palloix, Anne-Marie Sage-Palloix, Ariane Fazari, Wang Lihao, Ming Yan Hua, Caroline Djian-Caporalino
Rok vydání: 2012
Předmět:
Zdroj: Plant Breeding. 131:665-673
ISSN: 0179-9541
DOI: 10.1111/j.1439-0523.2012.01994.x
Popis: With 3 figures and 3 tables Abstract Root-knot nematodes (Meloidogyne spp.) are major plant pathogens, affecting several solanaceous crops worldwide including pepper (Capsicum spp.). Owing to the drastic reduction in the use of most nematicides, breeding for root-knot nematode resistance is a major challenge for pepper breeders. In pepper, resistance to this pathogen is dominant and controlled by several Me-genes, which were mapped on the pepper P9 chromosome using PCR-based markers, and by the N-gene which was shown to be linked to Me3 using allelism tests. In this study, we developed PCR-based markers and showed that the N-gene colocalized in the Me-genes cluster on the P9 chromosome on pepper reference maps using carthagene software (INRA: Institut National de la Recherche Agronomique, Toulouse, France). N was mapped at 7 cM from Me1 and 2 cM from Me3 which is confirmed to be allelic to Me7 according to allelism resistance tests. The tightly linked markers to Me and N-genes will be very useful for the marker-assisted selection of nematodes resistance in pepper and to study the durability of these R-genes, alone or pyramided in different genetic backgrounds.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje