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Genetic Mapping and Quantitative Trait Loci Analysis for Disease Resistance Using F2 and F5 Generation-based Genetic Maps Derived from ‘Tifrunner’ × ‘GT-C20’ in Peanut

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Relation http://oar.icrisat.org/7106/
http://dx.doi.org/10.3835/plantgenome2013.05.0018
10.3835/plantgenome2013.05.0018
 
Title Genetic Mapping and Quantitative Trait Loci Analysis for Disease Resistance Using F2 and F5 Generation-based Genetic Maps Derived from ‘Tifrunner’ × ‘GT-C20’ in Peanut
 
Creator Wang, H
Pandey, M K
Qiao, L
Qin, H
Culbreath, A K
He, G
Varshney, R K
Scully, B T
Guo, B
 
Subject Groundnut
Genetics and Genomics
 
Description One mapping population derived from Tifrunner × GT-C20 has shown great potential in developing a high density genetic map and identifying quantitative trait loci (QTL) for important disease resistance, tomato spotted wilt virus (TSWV) and leaf spot (LS). Both F2 and F5 generation-based genetic maps were previously constructed with 318 and 239 marker loci, respectively. Higher map density could be achieved with the F2 map (5.3 cM per locus) as compared to the F5 (5.7 cM per locus). Quantitative trait loci analysis using multi-environment phenotyping data from F8 and higher generations for disease resistance identified 54 QTL in the F2 map including two QTL for thrips (12.14–19.43% phenotypic variation explained [PVE]), 15 for TSWV (4.40–34.92% PVE), and 37 for LS (6.61–27.35% PVE). Twenty-three QTL could be identified in the F5 map including one QTL for thrips (5.86% PVE), nine for TSWV (5.20–14.14% PVE), and 13 for LS (5.95–21.45% PVE). Consistent QTL identified in each map have shown higher phenotypic variance than nonconsistent QTL. As expected, the number of QTL and their estimates of phenotypic variance were lower in the F5 map. This is the first QTL study reporting novel QTL for thrips, TSWV, and LS in peanut (Arachis hypogaea L.), and therefore, future studies will be conducted to refine these QTL.
 
Publisher Crop Science Society of America
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/7106/1/ThePlantGenome_6_1-10_2013.pdf
Wang, H and Pandey, M K and Qiao, L and Qin, H and Culbreath, A K and He, G and Varshney, R K and Scully, B T and Guo, B (2013) Genetic Mapping and Quantitative Trait Loci Analysis for Disease Resistance Using F2 and F5 Generation-based Genetic Maps Derived from ‘Tifrunner’ × ‘GT-C20’ in Peanut. The Plant Genome, 6 (3). pp. 1-10. ISSN 1940-3372