PMID: 9419386Feb 21, 1998Paper

Deleterious mutation accumulation and the regeneration of genetic resources

Proceedings of the National Academy of Sciences of the United States of America
D J SchoenT M Bataillon

Abstract

The accumulation of mildly deleterious mutations accompanying recurrent regeneration of plant germ plasm was modeled under regeneration conditions characterized by different amounts of selection and genetic drift. Under some regeneration conditions (sample sizes >/=75 individuals and bulk harvesting of seed) mutation accumulation was negligible, but under others (sample sizes <75 individuals or equalization of seed production by individual plants) mutation numbers per genome increased significantly during 25-50 cycles of regeneration. When mutations also are assumed to occur (at elevated rates) during seed storage, significant mutation accumulation and fitness decline occurred in 10 or fewer cycles of regeneration regardless of the regeneration conditions. Calculations also were performed to determine the numbers of deleterious mutations introduced and remaining in the genome of an existing variety after hybridization with a genetic resource and subsequent backcrossing. The results suggest that mutation accumulation has the potential to reduce the viability of materials held in germ plasm collections and to offset gains expected by the introduction of particular genes of interest from genetic resources.

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Citations

Sep 3, 2010·PLoS Biology·Dilara AllySarah P Otto
Aug 6, 2008·Conservation Biology : the Journal of the Society for Conservation Biology·María SauraArmando Caballero
Oct 17, 2013·Molecular Ecology·María Ángeles Rodríguez de CaraJesús Fernández
Jul 19, 2006·Cellular & Molecular Biology Letters·Katarzyna J ChwedorzewskaJerzy Puchalski
Mar 12, 2020·Proceedings. Biological Sciences·Adam J OrrRobert Lanfear
Mar 18, 2020·G3 : Genes - Genomes - Genetics·Megan L FritzYves Carrière

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