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Genet Sel Evol. 2006 Mar-Apr;38(2):147-65. Epub 2006 Feb 23.

Optimization of a crossing system using mate selection.

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  • 1School of Rural Science and Agriculture, University of New England, Armidale NSW 2351, Australia. Yongjun.Li@inw.agrl.ethz.ch

Abstract

A simple model based on one single identified quantitative trait locus (QTL) in a two-way crossing system was used to demonstrate the power of mate selection algorithms as a natural means of opportunistic line development for optimization of crossbreeding programs over multiple generations. Mate selection automatically invokes divergent selection in two parental lines for an over-dominant QTL and increased frequency of the favorable allele toward fixation in the sire-line for a fully-dominant QTL. It was concluded that an optimal strategy of line development could be found by mate selection algorithms for a given set of parameters such as genetic model of QTL, breeding objective and initial frequency of the favorable allele in the base populations, etc. The same framework could be used in other scenarios, such as programs involving crossing to exploit breed effects and heterosis. In contrast to classical index selection, this approach to mate selection can optimize long-term responses.

PMID:
16492372
[PubMed - indexed for MEDLINE]
PMCID:
PMC2689303
Free PMC Article
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