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Developmental Quantitative Genetics and the Evolution of Ontogenies

William R. Atchley
Evolution
Vol. 41, No. 2 (Mar., 1987), pp. 316-330
DOI: 10.2307/2409141
Stable URL: http://www.jstor.org/stable/2409141
Page Count: 15
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Developmental Quantitative Genetics and the Evolution of Ontogenies
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Abstract

A model is presented which permits integration of developmental information into genetic discussions about evolutionary change in morphology. Development of a trait is described in terms of an ontogenetic trajectory whose properties are defined by a small number of parameters. Some evolutionary aspects of development are examined from the perspective of this quantitative genetic model. Particular attention is given to the developmental origin of pleiotropic effects, developmental constraints, heterochrony, and the growth and morphogenesis of complex morphologies. The role of genetic maternal effects in mammalian development is briefly examined, particularly as it relates to selection on developmental traits.

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