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Genetic Mapping of Resistance to Meloidogyne arenaria in Arachis stenosperma: A New Source of Nematode Resistance for Peanut.
- Source :
-
G3 (Bethesda, Md.) [G3 (Bethesda)] 2015 Dec 12; Vol. 6 (2), pp. 377-90. Date of Electronic Publication: 2015 Dec 12. - Publication Year :
- 2015
-
Abstract
- Root-knot nematodes (RKN; Meloidogyne sp.) are a major threat to crops in tropical and subtropical regions worldwide. The use of resistant crop varieties is the preferred method of control because nematicides are expensive, and hazardous to humans and the environment. Peanut (Arachis hypogaea) is infected by four species of RKN, the most damaging being M. arenaria, and commercial cultivars rely on a single source of resistance. In this study, we genetically characterize RKN resistance of the wild Arachis species A. stenosperma using a population of 93 recombinant inbred lines developed from a cross between A. duranensis and A. stenosperma. Four quantitative trait loci (QTL) located on linkage groups 02, 04, and 09 strongly influenced nematode root galling and egg production. Drought-related, domestication and agronomically relevant traits were also evaluated, revealing several QTL. Using the newly available Arachis genome sequence, easy-to-use KASP (kompetitive allele specific PCR) markers linked to the newly identified RKN resistance loci were developed and validated in a tetraploid context. Therefore, we consider that A. stenosperma has high potential as a new source of RKN resistance in peanut breeding programs.<br /> (Copyright © 2016 Leal-Bertioli et al.)
- Subjects :
- Animals
Droughts
Genetic Markers
Genetics, Population
Genome, Plant
Genotype
Phenotype
Polymorphism, Single Nucleotide
Polyploidy
Quantitative Trait Loci
Quantitative Trait, Heritable
Reproducibility of Results
Stress, Physiological
Arachis genetics
Arachis parasitology
Chromosome Mapping
Disease Resistance genetics
Plant Diseases genetics
Plant Diseases parasitology
Tylenchoidea
Subjects
Details
- Language :
- English
- ISSN :
- 2160-1836
- Volume :
- 6
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- G3 (Bethesda, Md.)
- Publication Type :
- Academic Journal
- Accession number :
- 26656152
- Full Text :
- https://doi.org/10.1534/g3.115.023044