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Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-44228

Dmitriew, C; Blows, M W; Rowe, L (2010). Ontogenetic change in genetic variance in size depends on growth environment. American Naturalist, 175(6):640-649.

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Abstract

Within populations, the amount of environmental and genetic variation present may differ greatly among traits measured at multiple times over ontogeny. Brief periods of food deprivation are often followed by a period of accelerated (compensatory) growth. Early laboratory studies likewise reported a contraction of genetic variance in size as maturation approached. However, studies of wild populations often contradict these laboratory results. One possibility is that environmentally imposed stress is exposing genetic variance not seen in the laboratory. We tested the effect of rearing environment (high or low food) on genetic variance in size traits measured at two ages in the ladybird beetle Harmonia axyridis. A substantial amount of genetic variance was present in all combinations of rearing environment by ontogenetic stage among males. The pattern of change in male variance in mass over ontogeny was of opposite sign in the two food treatments, which may reflect cryptic genetic variance that is apparent only under stress. The proportion of overall variance that was due to additive genetic effects was much lower in females than in males, which suggests that the underlying genetics of female growth trajectories differs from that males. Our experimental design afforded an initial exploration of the genetics of compensatory growth.

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
DDC:570 Life sciences; biology
590 Animals (Zoology)
Uncontrolled Keywords:compensatory growth; quantitative genetics; ontogeny; G x E; canalization; mutational target size
Language:English
Date:2010
Deposited On:08 Feb 2011 11:59
Last Modified:28 Dec 2013 23:04
Publisher:University of Chicago Press
ISSN:0003-0147
Funders:Natural Sciences and Engineering Research Council (NSERC), Canada Research Chairs program
Additional Information:© 2010 by The University of Chicago
Publisher DOI:10.1086/652470
Other Identification Number:ISI:000277174400005
Citations:Web of Science®. Times Cited: 14
Google Scholar™
Scopus®. Citation Count: 15

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