Predicting Additive and Non-additive Genetic Effects from Trials Where Traits Are Affected by Interplot Competition

  • Colleen H. Hunt
  • Alison B. Smith
  • David R. Jordan
  • Brian R. Cullis


There are two key types of selection in a plant breeding program, namely selection of hybrids for potential commercial use and the selection of parents for use in future breeding. Oakey et al. (in Theoretical and Applied Genetics 113, 809–819, 2006) showed how both of these aims could be achieved using pedigree information in a mixed model analysis in order to partition genetic effects into additive and non-additive effects. Their approach was developed for field trial data subject to spatial variation. In this paper we extend the approach for data from trials subject to interplot competition. We show how the approach may be used to obtain predictions of pure stand additive and non-additive effects. We develop the methodology in the context of a single field trial using an example from an Australian sorghum breeding program.

Key Words

Mixed models Statistical analysis Variogram Spatial trends Competition Pure stand Pedigree information Parental effects 


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Copyright information

© International Biometric Society 2012

Authors and Affiliations

  • Colleen H. Hunt
    • 1
    • 2
  • Alison B. Smith
    • 3
  • David R. Jordan
    • 4
  • Brian R. Cullis
    • 3
    • 5
  1. 1.Queensland Department of Agriculture, Fisheries and ForestryHermitage Research StationWarwickAustralia
  2. 2.The University of Queensland School of Agriculture and Food ScienceBrisbaneAustralia
  3. 3.School of Mathematics and Applied Statistics, Faculty of InformaticsUniversity of WollongongWollongongAustralia
  4. 4.Queensland Alliance for Agriculture and Food InnovationHermitage Research StationWarwickAustralia
  5. 5.Mathematics Informatics and StatisticsCSIROClaytonAustralia

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