Genetic dissection of rice blast resistance by QTL mapping approach using an F3 population

Rice blast is one of the major fungal diseases that badly reduce rice production in Asia including Malaysia. There is not much information on identification of QTLs as well as linked markers and their association with blast resistance within local rice cultivars. In order to understanding of the gen...

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Bibliographic Details
Published in:Molecular biology reports 2013-03, Vol.40 (3), p.2503-2515
Main Authors: Ashkani, S., Rafii, M. Y., Rahim, H. A., Latif, M. A.
Format: Article
Language:English
Subjects:
Animal Anatomy
Animal Biochemistry
Biomedical and Life Sciences
Chromosome Mapping
Crosses, Genetic
Disease Resistance - genetics
Genetic Linkage
Genotype
Histology
Life Sciences
Magnaporthe
Microsatellite Repeats
Morphology
Oryza - genetics
Oryza - microbiology
Phenotype
Plant Diseases - genetics
Plant Diseases - microbiology
Quantitative Trait Loci
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Summary:Rice blast is one of the major fungal diseases that badly reduce rice production in Asia including Malaysia. There is not much information on identification of QTLs as well as linked markers and their association with blast resistance within local rice cultivars. In order to understanding of the genetic control of blast in the F 3 families from indica rice cross Pongsu seribu2/Mahsuri, an analysis of quantitative trait loci against one of the highly virulent Malaysian rice blast isolate Magnaporthe oryzae , P5.0 was carried out. Result indicated that partial resistance to this pathotype observed in the present study was controlled by multiple loci or different QTLs. In QTL analysis in F 3 progeny fifteen QTLs on chromosomes 1, 2, 3, 5, 6, 11 and 12 for resistance to blast nursery tests was identified. Three of detected QTLs (qRBr-6.1, qRBr-11.4, and qRBr-12.1) had significant threshold (LOD >3) and approved by both IM and CIM methods. Twelve suggestive QTLs, qRBr-1.2, qRBr-2.1, qRBr-4.1, qRBr-5.1, qRBr-6.2, qRBr-6.3, qRBr-8.1, qRBr-10.1, qRBr-10.2, qRBr-11.1, qRBr-11.2 and qRBr-11.3) with Logarithmic of Odds (LOD)
ISSN:0301-4851
1573-4978
DOI:10.1007/s11033-012-2331-3