Document Detail


Construction of chromosome segment substitution lines in peanut (Arachis hypogaea L.) using a wild synthetic and QTL mapping for plant morphology.
MedLine Citation:
PMID:  23185268     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Chromosome segment substitution lines (CSSLs) are powerful QTL mapping populations that have been used to elucidate the molecular basis of interesting traits of wild species. Cultivated peanut is an allotetraploid with limited genetic diversity. Capturing the genetic diversity from peanut wild relatives is an important objective in many peanut breeding programs. In this study, we used a marker-assisted backcrossing strategy to produce a population of 122 CSSLs from the cross between the wild synthetic allotetraploid (A. ipaënsis×A. duranensis)(4x) and the cultivated Fleur11 variety. The 122 CSSLs offered a broad coverage of the peanut genome, with target wild chromosome segments averaging 39.2 cM in length. As a demonstration of the utility of these lines, four traits were evaluated in a subset of 80 CSSLs. A total of 28 lines showed significant differences from Fleur11. The line×trait significant associations were assigned to 42 QTLs: 14 for plant growth habit, 15 for height of the main stem, 12 for plant spread and one for flower color. Among the 42 QTLs, 37 were assigned to genomic regions and three QTL positions were considered putative. One important finding arising from this QTL analysis is that peanut growth habit is a complex trait that is governed by several QTLs with different effects. The CSSL population developed in this study has proved efficient for deciphering the molecular basis of trait variations and will be useful to the peanut scientific community for future QTL mapping studies.
Authors:
Daniel Fonceka; Hodo-Abalo Tossim; Ronan Rivallan; Hélène Vignes; Elodie Lacut; Fabien de Bellis; Issa Faye; Ousmane Ndoye; Soraya C M Leal-Bertioli; José F M Valls; David J Bertioli; Jean-Christophe Glaszmann; Brigitte Courtois; Jean-François Rami
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2012-11-19
Journal Detail:
Title:  PloS one     Volume:  7     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2012  
Date Detail:
Created Date:  2012-11-27     Completed Date:  2013-05-14     Revised Date:  2013-07-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e48642     Citation Subset:  IM    
Affiliation:
CIRAD, UMR AGAP, Montpellier, France.
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MeSH Terms
Descriptor/Qualifier:
Arachis hypogaea / anatomy & histology*,  genetics*
Breeding
Chi-Square Distribution
Chromosome Mapping / methods*
Chromosomes, Plant / genetics*
Evolution, Molecular
Genetic Loci / genetics
Genome, Plant / genetics
Heterozygote
Inbreeding
Phenotype
Quantitative Trait Loci / genetics*
Quantitative Trait, Heritable
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