title: Comparison of analyses of the QTLMAS XIV common dataset. I: genomic selection.
abstract: BACKGROUND
  For the XIV QTLMAS workshop, a dataset for traits with complex genetic architecture has been simulated and released for analyses by participants. One of the tasks was to estimate direct genomic values for individuals without phenotypes. The aim of this paper was to compare results of different approaches used by the participants to calculate direct genomic values for quantitative trait (QT) and binary trait (BT).
  
  
  RESULTS
  Participants applied 26 approaches for QT and 15 approaches for BT. Accuracy for QT was between 0.26 and 0.89 for males and between 0.31 and 0.89 for females, and for BT ranged from 0.27 to 0.85. For QT, percentage of lost response to selection varied from 8% to 83%, whereas for BT the loss was between 15% and 71%.
  
  
  CONCLUSIONS
  Bayesian model averaging methods predicted breeding values slightly better than GBLUP in a simulated data set. The methods utilizing genomic information performed better than traditional pedigree based BLUP analyses. Bivariate analyses was slightly advantageous over single trait for the same method. None of the methods estimated the non-additivity of QTL affecting the QT, which may be one of the constrains in accuracy observed in real data.
authors.affiliation: Department of Genetics and Animal Breeding, Poznan University of Life Sciences, Wolynska 33, 60-637 Poznan, Poland. mcszyd@jay.up.poznan.pl.
authors.forename: Marcin
authors.initials: M
authors.lastname: Pszczola
authors.forename: Tomasz
authors.initials: T
authors.lastname: Strabel
authors.forename: Anna
authors.initials: A
authors.lastname: Wolc
authors.forename: Sebastian
authors.initials: S
authors.lastname: Mucha
authors.forename: Maciej
authors.initials: M
authors.lastname: Szydlowski