Abstract

The effects of assortative mating of selected individuals on response to indirect or pedigree 
selection were analyzed, using two experiments in Tribolium castaneum. Each consisted of a 
randomly (R) and assortatively (A) mated line with three replicates in each line. In experiment 1, 
correlated response for adult weight was evaluated using selection and assortative mating on pupal 
length. Experiment 2 was designed to evaluate the effectiveness of pedigree selection for adult 
weight when combined with assortative mating for this trait. The proportion of selection was 25% 
in both experiments. Phenotypic correlations between mates in the A lines were not significantly 
different from 1. Average selection response was similar in both lines of each experiment, although 
the correlated response for adult weight in experiment 1 was higher in the A line (.26 ± .08 
versus .12 ± .07). Average response for the selectioon goal was statistically significant for both 
lines in both experiments.
 

J. L Campo, M. G Gil

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., , 111–114, 1994