The Lansing effect of age-mediated changes in genetic parameters. | [Biologia • 1983]

Author(s):

1. S. A. Shami: Genetics Department, University of College, Swansea, UK

2. J. A. Beardmore: Genetics Department, University of College, Swansea, UK

Abstract:

The influence of variation in age of grand parents upon the heritability of two quasi quantitative characters has been studied in the guppy (Poecflio reticulate) and (Drosophila melanogaster). In both cases effects on heritability paralleling those already demonstrated to occur with variation in parental age were found and may be regarded as examples of Lansing effects. Analysis of components of variance of sternopleural bristle number in Drosophila suggest that effectively the genotypic variance for this character is increased in the progenies of older parents largely as consequence of an increase in additive variance. It appears probable that this results from age mediated changes in mechanisms of gene control. Both the effects described seem likely to be the reflection of fundamental aspects of ageing processes in biological system.

Page(s): 149-167

DOI: DOI not available

Published: Journal: Biologia, Volume: 29, Issue: 2, Year: 1983

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