G. Gopikrishna et al., LONG-TERM SELECTION FOR A QUANTITATIVE TRAIT IN TRIBOLIUM-CASTANEUM .1. RESPONSE TO SELECTION, Indian Journal of Animal Sciences, 65(8), 1995, pp. 908-917
An experiment with the flour beetle Tribolium castaneum was carried ou
r to study the long-term response ro selection for pupal weight, for a
period of 20 generation. Three population sizes (10, 20 and 40 pairs
of parents) and three proportions selected (10%, 20% and 30%) were con
sidered along with a control for each population size. The experiment
was replicated twice. The response, in general, was maximum in lines u
nder 10% selection, followed by 20% and 30%. The population size 40 wa
s superior to 10 and 20. The performance of controls was stable throug
hout the experiment. The responses predicted using conventional approa
ch were much higher than the observed values.