Journal article
Curation of wheat maps to improve map accuracy and QTL detection
Australian Journal of Agricultural Research, Vol.56(12)
2005
Abstract
Three Australian doubled haploid populations were used to illustrate the importance of map curation in order to improve the quality of linkage maps and quantative trait locus (QTL) detection. The maps were refined and improved by re-examining the order of markers, inspection of the genetic maps in relation to a consensus map, editing the marker data for double crossovers, and determining estimated recombination fractions for all pairs of markers. The re-ordering of markers and replacing genotypes at double crossovers with missing values resulted in an overall decrease in the length of the maps. Fewer apparent genotyping errors, associated with the presence of double recombinants, were identified with restriction fragment length polymorphisms (RFLPs) than with other types of markers used in this study. The complications that translocations may cause in the ordering of markers and subsequent QTL analysis were investigated. QTL analysis using both the original and revised maps indicated that QTL peaks were more sharply located or had improved log-likelihood (LOD) scores in the revised maps. An accurate indication of the QTL peak and a significant LOD score are both essential for the identification of markers suitable for marker-assisted selection. Recommendations are provided for the improvement of the quality of linkage maps.
Details
- Title
- Curation of wheat maps to improve map accuracy and QTL detection
- Authors/Creators
- A. Lehmensiek (Author/Creator) - University of Southern QueenslandP.J. Eckermann (Author/Creator) - The University of AdelaideA.P. Verbyla (Author/Creator) - The University of AdelaideR. Appels (Author/Creator) - Murdoch UniversityM.W. Sutherland (Author/Creator) - University of Southern QueenslandG.E. Daggard (Author/Creator) - University of Southern Queensland
- Publication Details
- Australian Journal of Agricultural Research, Vol.56(12)
- Publisher
- CSIRO
- Identifiers
- 991005544048907891
- Copyright
- © CSIRO 2005.
- Murdoch Affiliation
- Cooperative Research Centre for Molecular Plant Breeding
- Language
- English
- Resource Type
- Journal article
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Source: InCites
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- Collaboration types
- Domestic collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.96 QTL
- Web Of Science research areas
- Agriculture, Multidisciplinary
- ESI research areas
- Agricultural Sciences