bacterium Escherichia coli: the roles of environment, phylogeny and chance. Dissertation (Michigan State Univ., East Lansing, MI).

Turelli, M. (1988) Phenotypic evolution, constant covariances, and the maintenance of additive variance. Evolution 42, 1342–1347.

Vasi, F., Travisano, M. and Lenski, R. E. (1994) Long-term experimental evolution in Escherichia coli. II. Changes in life history traits during adaptation to a seasonal environment. Am. Nat. 144, 432–456.

Wade, M. J. and Goodnight, C. J. (1991) Wright's shifting balance theory: an experimental study. Science 253, 1015–1018.

Wright, S. (1932) The roles of mutation, inbreeding, crossbreeding and selection in evolution. Proc. 6th Int. Congr. Genet. 1, 356–366.

Wright, S. (1982) Character change, speciation, and the higher taxa. Evolution 36, 427–443.

Wright, S. (1988) Surfaces of selective value revisited. Am. Nat. 131, 115–123.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement