“…The methodologies vary according to the number of evaluated traits, the nature of the phenotypic data distribution, the genetic structure adopted and the estimation method of the variance components. For example, by the assumption of linear (Gordo et al, 2012;Forutan, Mahyari, & Sargolzaei, 2015) or threshold distribution of phenotypes (Faria et al, 2009;Boligon et al, 2012;Forutan, Mahyari, & Sargolzaei, 2015), by using sire or animal models (Forutan, Mahyari, & Sargolzaei, 2015); and by adopting restricted maximum likelihood (Bouquet et al, 2010;Queiroz et al, 2011), Bayesian (Boligon et al, 2012;Santana Jr. et al, 2013) or generalized linear mixed model approaches (Forutan, Mahyari, & Sargolzaei, 2015) as estimation methods. These methodologies can be applied in a combined way.…”