Prospects for breeding methods. Selection of molecular markers for prediction of heterosis with an application to wheat | [Perspectives pour les méthodes d'amélioration. Sélection de marqueurs moléculaires pour la prédiction de l'hétérosis chez le blé]
2001
Groos, C. ((Institut National de la Recherche Agronomique, Clermont Ferrand (France). Centre de Clermont Ferrand Theix, Station d'Amélioration des Plantes)) | Oury, F.X. | Sourdille, P. | Bernard, M. | Charmet, G.
In most studies done in different species, the correlation between heterosis for a given trait and the genetic distance based on molecular markers is weak. This could be due to the use of anonymous markers (i.e. not linked to genes controlling heterosis) for the estimation of the genetic distance. In the present study, we propose an algorithm to select, from a set of molecular markers, the subset that provides the genetic distance the most correlated with heterosis. Used on wheat hybrids data, this program showed its efficiency to improve the correlation. The possibilities of practical use of the program are discussed. The correlations were insufficient to allow prediction of heterosis. However, this method can be used to detect genetic regions influencing heterosis and could provide useful information for a better understanding of the genetic basis of heterosis
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