Publication Title: 
Cappa et al. (2018)
Title: 
Genomic-based multiple-trait evaluation in Eucalyptus grandis using dominant DArT markers.
Authors: 
Cappa Eduardo P, El-Kassaby Yousry A, Muñoz Facundo, Garcia Martín N, Villalba Pamela V, Klápště Jaroslav, Marcucci Poltri Susana N
Publication Year: 
2018
Series Name: 
Plant science : an international journal of experimental plant biology
Abstract: 
We investigated the impact of combining the pedigree- and genomic-based relationship matrices in a multiple-trait individual-tree mixed model (a.k.a., multiple-trait combined approach) on the estimates of heritability and on the genomic correlations between growth and stem straightness in an open-pollinated Eucalyptus grandis population. Additionally, the added advantage of incorporating genomic information on the theoretical accuracies of parents and offspring breeding values was evaluated. Our results suggested that the use of the combined approach for estimating heritabilities and additive genetic correlations in multiple-trait evaluations is advantageous and including genomic information increases the expected accuracy of breeding values. Furthermore, the multiple-trait combined approach was proven to be superior to the single-trait combined approach in predicting breeding values, in particular for low-heritability traits. Finally, our results advocate the use of the combined approach in forest tree progeny testing trials, specifically when a multiple-trait individual-tree mixed model is considered.
Keywords: 
  • Eucalyptus genetics
  • Eucalyptus growth & development
  • Genetic Markers genetics
  • Genomics
  • Models, Genetic
  • Pedigree
  • Plant Breeding methods
  • Plant Stems anatomy & histology
  • Plant Stems growth & development
  • Quantitative Trait, Heritable
Volume: 
271
Issue: 
Page Numbers: 
27-33
PubMed: