The covariance structure of life-history characters in Daphnia pulex

K. Spitze, J. Burnson, Michael Lynch

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

Although there is no genetic correlation between offspring size and offspring number, present growth and present reproduction are both strongly positively correlated genetically with future reproduction, and early maturity is genetically correlated with larger clutch size. Although the ubiquity of antagonisitc pleiotropy has been recently questioned, there are peculiarities of cyclical parthenogenesis that could lead to positive life-history covariance even when negative covariance would be expected in a similar sexual species. These include the influence of nonadditive gene action on evolution in clonally reproducing organisms, and the periodic release of hidden genetic variance within populations of cyclical parthenogens. Examination of matrix similarity reveals no evidence to suggest that the genetic covariance matrices differ between the populations, but there is considerable evidence that the phenotypic and environmental covariance matrices differ between populations. Results indicate approximate stability of the genetic covariance matrix within species, an important assumption of many phenotypic evolution models, but should caution against the use of phenotypic in place of genetic covariance matrices. -from Authors

Original languageEnglish (US)
Pages (from-to)1081-1090
Number of pages10
JournalEvolution
Volume45
Issue number5
StatePublished - Jan 1 1991
Externally publishedYes

Fingerprint

Daphnia
genetic covariance
Daphnia pulex
life history
matrix
Reproduction
Clutch Size
Parthenogenesis
Population
pleiotropy
parthenogenesis
genetic variance
clutch size
genetic correlation
early development
organisms
Growth
Genes
genes
gene

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Agricultural and Biological Sciences(all)

Cite this

The covariance structure of life-history characters in Daphnia pulex. / Spitze, K.; Burnson, J.; Lynch, Michael.

In: Evolution, Vol. 45, No. 5, 01.01.1991, p. 1081-1090.

Research output: Contribution to journalArticle

Spitze, K, Burnson, J & Lynch, M 1991, 'The covariance structure of life-history characters in Daphnia pulex', Evolution, vol. 45, no. 5, pp. 1081-1090.
Spitze, K. ; Burnson, J. ; Lynch, Michael. / The covariance structure of life-history characters in Daphnia pulex. In: Evolution. 1991 ; Vol. 45, No. 5. pp. 1081-1090.
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