4.5 Editorial Material

UNDERSTANDING THE EVOLUTION AND STABILITY OF THE G-MATRIX

Journal

EVOLUTION
Volume 62, Issue 10, Pages 2451-2461

Publisher

WILEY
DOI: 10.1111/j.1558-5646.2008.00472.x

Keywords

Adaptive landscape; genetic variance-covariance matrix; phenotypic evolution; selection surface

Funding

  1. NIGMS NIH HHS [F32 GM076995, F32 GM076995-01A1] Funding Source: Medline
  2. NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [F32GM076995] Funding Source: NIH RePORTER

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The G-matrix summarizes the inheritance of multiple, phenotypic traits. The stability and evolution of this matrix are important issues because they affect our ability to predict how the phenotypic traits evolve by selection and drift. Despite the centrality of these issues, comparative, experimental, and analytical approaches to understanding the stability and evolution of the G-matrix have met with limited success. Nevertheless, empirical studies often find that certain structural features of the matrix are remarkably constant, suggesting that persistent selection regimes or other factors promote stability. On the theoretical side, no one has been able to derive equations that would relate stability of the G-matrix to selection regimes, population size, migration, or to the details of genetic architecture. Recent simulation studies of evolving G-matrices offer solutions to some of these problems, as well as a deeper, synthetic understanding of both the G-matrix and adaptive radiations.

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