The analysis of quantitative traits in wheat mapping populations

A - Papers appearing in refereed journals

Eckermann, P. J., Verbyla, A. P., Cullis, B. R. and Thompson, R. 2001. The analysis of quantitative traits in wheat mapping populations. Australian Journal of Agricultural Research. 52 (12), pp. 1195-1206.

AuthorsEckermann, P. J., Verbyla, A. P., Cullis, B. R. and Thompson, R.
Abstract

This paper discusses the analysis of quantitative trait loci (QTLs) using molecular markers from a doubled haploid wheat mapping population arising from the Cranbrook Halberd cross. Two field trials are used to provide phenotypic information on the trait of interest, which is grain percentage protein. Methods for QTL analysis are reviewed together with methods for the analysis of field trials. The aim of the paper is to examine different approaches for QTL analysis, namely the conventional approach available in standard software, which ignores field variation, a 2-stage approach that provides adjusted phenotypic effects for a subsequent QTL analysis, and a joint marker and spatial analysis. The major effect, however, is the maturity class of the doubled haploid lines. Maturity and percent protein appear highly correlated genetically so QTL analysis shows marked changes if maturity is included as a covariate. More subtle changes occur due to field variation but this may not be the standard situation.

Keywordsbest linear unbiased prediction; QTL analysis; REML; spatial analysis; field experiments
Year of Publication2001
JournalAustralian Journal of Agricultural Research
Journal citation52 (12), pp. 1195-1206
Digital Object Identifier (DOI)doi:10.1071/AR01039
Open accessPublished as non-open access
Funder project or code445
513
Research in statistics relevant to biological processes
Output statusPublished
Publication dates
Print15 Nov 2001
Publication process dates
Accepted22 Jun 2001
Copyright licensePublisher copyright
ISSN0004-9409
PublisherCSIRO Publishing

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