The quantitative genetic analysis of primate dental variation: history of the approach and prospects for the future

doi:10.1017/CBO9780511542442.014

14 - The quantitative genetic analysis of primate dental variation: history of the approach and prospects for the future

Published online by Cambridge University Press: 12 September 2009

Oliver T. Rizk ,

Sarah K. Amugongo ,

Michael C. Mahaney and

Leslea J. Hlusko

Edited by

Joel D. Irish and

Greg C. Nelson

Show author details

Oliver T. Rizk: Affiliation:
Department of Integrative Biology, University of California, 3060 Valley Life Sciences Building, Berkeley, California 94720, USA
Sarah K. Amugongo: Affiliation:
Department of Integrative Biology, University of California, 3060 Valley Life Sciences Building, Berkeley, California 94720, USA
Michael C. Mahaney: Affiliation:
Southwest National Primate Research Center, Southwest Foundation for Biomedical Research, PO Box 760549, San Antonio, Texas 78245, USA
Leslea J. Hlusko: Affiliation:
Department of Integrative Biology, University of California, 3060 Valley Life Sciences Building, Berkeley, California 94720, USA
Joel D. Irish: Affiliation:
University of Alaska, Fairbanks
Greg C. Nelson: Affiliation:
University of Oregon

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Summary

Introduction

From the size and shape of teeth we can learn much about an animal's diet, gain some insight as to how it interacted with its conspecifics and environment, and draw conclusions about its phylogenetic placement. Consequently, primate dental variation has been the focus of an immense amount of research (as evidenced by this volume). These adaptive and phylogenetic scenarios rely on the assumption that variation in the dental phenotype is heritable, or rather, that this variation can be passed on from generation to generation as selection filters through the available phenotypic variance.

In this chapter, we discuss the history of research that tests this hypothesis through quantitative genetic analyses. We will focus attention on analyses of crown morphology with the aim of summarizing what is currently known and unknown about the extent to which dental variation is influenced by genetic factors. And last, we discuss two directions through which quantitative genetics will further enhance our understanding of the evolution of our ancestors and closest relatives.

Quantitative genetics

Quantitative genetics is concerned with the inheritance of those differences between individuals that are of degree rather than of kind, quantitative rather than qualitative. These are the individual differences which, as Darwin wrote, “afford materials for natural selection to act on and accumulate …” An understanding of the inheritance of these differences is thus of fundamental significance in the study of evolution and in the application of genetics to animal and plant breeding.

(Falconer, 1989, p. 1)

Type: Chapter
Information: Technique and Application in Dental Anthropology , pp. 317 - 346

DOI: https://doi.org/10.1017/CBO9780511542442.014 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2008

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