Estimates have been obtained of the variation deriving from mutation for 6-week body weight in the mouse from two experiments: (1) Long term selection was practised from an inbred base, which gave an estimate of the mutational heritability, h ^ (the ratio of the variance from mutation each generation to the environmental variance) of 0.6%; and (2) short term selection was practised from the cross of two long separated inbred sublines, which gave an estimate of h 0f 0.1%. Explanations for this difference and the information it gives us about the relation between effects of mutants on body size and fitness are discussed.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., , 67–70, 1994
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