Resumen de Siete generaciones de selección divergente para la variabilidad del peso al nacimiento en ratones
Nora Formoso Rafferty Castilla, Noelia Ibáñez Escriche, Juan Pablo Gutiérrez García, I. Cervantes Navarro
The aim of the genetic selection in animal breeding has traditionally been the increase in the mean of the productive traits. Selection for less sensitivity with respect to environmental effects as indicated by a low variation around the optimum trait value has benefits in the productivity and in the animal welfare and it is already and will be in the future one of the main targets of selection. The aim of this research was to analyse the genetic trend during seven generations of a divergent selection for environmental variance for birth weight in mice. A model assuming a heterogeneous environmental variance and partially under genetic control was used. The phenotypic variances of the birth weight across generations showed differences between the high and low variability lines. Genetic control of the birth weight environmental variability seems to be possible in mice.
