Quantitative genetics and the management of genetic resources. Measuring genome-wide spontaneous mutation in T. durum: implications for long-term selection response and management of genetic resources | [Génétique quantitative et gestion des ressources génétiques. Mesure de l'accumulation des mutations spontanées chez T. durum : implications dans la réponse à long terme de la sélection et de la gestion des ressources génétiques]
2001
Bataillon, T. ((Institut National de la Recherche Agronomique, Mauguio (France). Centre de Corse, Unité Mixte de Recherche Diversité et Génome des Plantes Cultivées)) | Roumet, P. | Poirier, P. | David, J.
We present preliminary results from a mutation accumulation experiment on Triticum durum. Five hundred lines, derived from a single fixed genotype, were maintained using a singleseed descent procedure whereby each sub-line contributes exactly one offspring to the next generation. After seven generations, a random sample of 135 lines was assayed in a common garden experiment along with 60 control lines. Estimates of the mutational heritability (mutational variance standardized by the environmental variance) for heading date as well as simple yield components are found to be on the order of 0.01. We find that mutations deteriorate productivity (total number of seeds produced) with mean homozygous effect s= -0.2 and arise at a rate U=0.05 (per haploid genome)
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