The analysis of quantitative trait loci in multi-environment trials using a multiplicative mixed model

A - Papers appearing in refereed journals

Verbyla, A. P., Eckermann, P. J., Thompson, R. and Cullis, B. R. 2003. The analysis of quantitative trait loci in multi-environment trials using a multiplicative mixed model. Australian Journal of Agricultural Research. 54 (12), pp. 1395-1408.

AuthorsVerbyla, A. P., Eckermann, P. J., Thompson, R. and Cullis, B. R.
Abstract

A new approach for multi-environment quantitative trait locus (QTL) analysis based on an appropriate genetic model is presented. To accommodate a multi-environment analysis, the size of a QTL effect is assumed to be a random effect. The approach results in a multiplicative mixed model for QTL × environment interaction of the factor analytic type. The full genetic model may also include a factor analytic model for the residual genotype × environment interaction, whereas the environmental model for the non-genetic variation involves local, global, and extraneous variation. The approach is used to determine QTLs for yield in the Arapiles × Franklin doubled haploid population of the National Barley Molecular Marker Program. Analysis leads to the determination of 8 QTLs. Many of these QTLs are associated with other traits.

Keywordsfactor analytic models; genotype by environment interaction; mixed models; multiplicative mixed models; QTL analysis; regression interval analysis; residual variation
Year of Publication2003
JournalAustralian Journal of Agricultural Research
Journal citation54 (12), pp. 1395-1408
Digital Object Identifier (DOI)doi:10.1071/AR02239
Open accessPublished as non-open access
Funder project or code445
513
Research in statistics relevant to biological processes
Publication dates
Print17 Dec 2003
Publication process dates
Accepted20 Jun 2003
Copyright licensePublisher copyright
PublisherCSIRO Publishing
ISSN0004-9409

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