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Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection.

Publication ,  Journal Article
Mitchell-Olds, T; Bergelson, J
Published in: Genetics
February 1990

Measurement of natural selection on correlated characters provides valuable information on fitness surfaces, patterns of directional, stabilizing, or disruptive selection, mechanisms of fitness variation operating in nature, and possible spatial variation in selective pressures. We examined effects of seed weight, germination date, plant size, early growth, and late growth on individual fitness. Path analysis showed that most characters had direct or indirect effects on individual fitness, indicating directional selection. For most early life-cycle characters, indirect effects via later characters exceed the direct causal effect on fitness. Selection gradients were uniform across the experimental site. There was no evidence for stabilizing or disruptive selection. We discuss several definitions of stabilizing and disruptive selection. Although early events in the life of an individual have important causal effects on subsequent characters and fitness, there is no detectable genetic variance for most of these characters, so little or no genetic response to natural selection is expected.

Duke Scholars

Published In

Genetics

EISSN

1943-2631

ISSN

0016-6731

Publication Date

February 1990

Volume

124

Issue

2

Start / End Page

416 / 421

Related Subject Headings

  • Selection, Genetic
  • Regression Analysis
  • Plants
  • Plant Development
  • Phenotype
  • Least-Squares Analysis
  • Developmental Biology
  • 3105 Genetics
  • 3101 Biochemistry and cell biology
  • 0604 Genetics
 

Citation

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Mitchell-Olds, T., & Bergelson, J. (1990). Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection. Genetics, 124(2), 416–421.
Mitchell-Olds, T., and J. Bergelson. “Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection.Genetics 124, no. 2 (February 1990): 416–21.
Mitchell-Olds T, Bergelson J. Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection. Genetics. 1990 Feb;124(2):416–21.
Mitchell-Olds, T., and J. Bergelson. “Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection.Genetics, vol. 124, no. 2, Feb. 1990, pp. 416–21.
Mitchell-Olds T, Bergelson J. Statistical genetics of an annual plant, Impatiens capensis. II. Natural selection. Genetics. 1990 Feb;124(2):416–421.

Published In

Genetics

EISSN

1943-2631

ISSN

0016-6731

Publication Date

February 1990

Volume

124

Issue

2

Start / End Page

416 / 421

Related Subject Headings

  • Selection, Genetic
  • Regression Analysis
  • Plants
  • Plant Development
  • Phenotype
  • Least-Squares Analysis
  • Developmental Biology
  • 3105 Genetics
  • 3101 Biochemistry and cell biology
  • 0604 Genetics