root‐knot nematode resistance N‐gene co‐localizes in the Me‐genes cluster on the pepper (Capsicum annuum L.) P9 chromosome

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...

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Bibliographic Details
Published in:Plant breeding 2012-10, Vol.131 (5), p.665-673
Main Authors: Fazari, Ariane, Palloix, Alain, Wang, Lihao, Yan Hua, Ming, Sage‐Palloix, Anne‐Marie, Zhang, Bao Xi, Djian‐Caporalino, Caroline
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
allelism
Biological and medical sciences
breeding
Capsicum annuum
Chromosomes
Computer programs
computer software
Crops
durability
Fundamental and applied biological sciences. Psychology
Gene mapping
Genes
genetic background
Genetics
Genetics and breeding of economic plants
Integrated pepper map
Life Sciences
marker-assisted selection
Me resistance genes
Meloidogyne
Meloidogyne spp
N resistance gene
nematicides
Nematoda
Nematodes
Pathogens
pepper
Plant breeding
plant pathogens
software
Solanaceae
Varietal selection. Specialized plant breeding, plant breeding aims
Vegetal Biology
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Summary: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.
ISSN:0179-9541
1439-0523
DOI:10.1111/j.1439-0523.2012.01994.x