Comparison of selection methodologies under genetic drift

P.L.S. Carneiro C.H.M. Malhado P.R.A.M. Affonso R.F. Euclydes A.P.S. Carneiro E.E. Cunha L.G.R. Souza About the authors

This work was carried out to determine the required number of replicates for comparison of conventional and molecular marker-associated selection methods in distinct effective population sizes and different mating systems, by simulations using the software GENESYS. Effective populational size of 18.18 (ES1) and 66.66 (ES2), and one, 10, and 30 replicates per generation were used to compare the different selection methods, based on mean phenotypic values. Incongruences results were observed when a single replicate was considered independently of effective size (ES1or ES2) and the mating system (random mating; exclusion of full-sibs or exclusion of both full and half-sibs). Genetic oscillation influenced the genetic gain, mainly in populations of small effective size. Furthermore, at least 10 replicates per generation were required to obtain sound consistent results for both selection methods.

BLUP; molecular marker; effective population size; mating system


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