Issue |
OCL
Volume 8, Number 5, Septembre-Octobre 2001
|
|
---|---|---|
Page(s) | 496 - 501 | |
Section | Dossier : Aspects des filières semencières Nord/Sud | |
DOI | https://doi.org/10.1051/ocl.2001.0496 | |
Published online | 15 September 2001 |
SELECTION Etude de l’efficacité de la sélection assistée par marqueurs par rapport à la sélection classique
Selection Efficiency of marker-assisted selection compared with conventional selection
Inra-UPS-Ina-PG, Station de génétique végétale, Ferme du Moulon, 91190 Gif-sur-Yvette, France
Après avoir fait une rapide revue des résultats disponibles à ce jour sur l’utilisation des marqueurs dans les expériences de rétro-croisement, nous nous intéresserons à l’efficacité de la SAM pour la prédiction des valeurs génétiques en nous appuyant notamment sur les résultats préliminaires d’une expérience de SAM en cours à la station de génétique végétale du Moulon.
Abstract
Marker-assisted selection (MAS) has received extensive attention in the past ten years. Two main strategies of MAS have been proposed: the use of markers to control the introgression of gene or QTL (quantitative trait locus), and the use of markers to predict breeding values in a population under selection. Theoretical and experimental results published on the interest of these two strategies are presented, focusing on the preliminary results of a MAS experiment performed on a maize population. From these results it appears that markers can be very efficient to quickly fix favorable alleles at target genes. Nevertheless, potential interactions between QTL (or genes) and environmental conditions or genetic background can reduce the efficiency of MAS. Further work is needed to optimize the use of markers in selection.
Key words: marker-assisted selection / introgression / breeding programme / quantitative trait loci
© John Libbey Eurotext 2001
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