Genetics and Variation in Survival and Reproduction

Abstract

An understanding of the genetic basis of variation in survival and reproduction requires integration of ideas from several different scientific fields including: population genetics, mathematical demography, life‐history biology and quantitative genetics.

Keywords: quantitative genetics; demography; mutation; age‐structure; plasticity

Figure 1.

An illustration of the principles of the breeder's equation (equation in the text). The x‐ and y‐axis represent the measured values of a phenotypic character under selection. Parents with a phenotypic value >90 are selected (blue circles) to produce the next generation of offspring. Individuals with a phenotypic value <90 (red triangles) do not contribute genes to the subsequent generation. The selection differential (S) is the difference in the mean value of all the parents in the population (where the solid line crosses the x‐axis) and the mean value of the selected parents (where the dashed line crosses the x‐axis). The response to selection (R) is the difference between the mean phenotype of all the parents (where the solid line crosses the y‐axis) and the mean phenotype of all the offspring from selected parents (where the dashed line crosses the y‐axis).

Figure 2.

An example of genotype by environment interaction (ǦE). The plot represents the value of a phenotypic character measured in three different environments (A, B and C). Three genotypes are presented. For example, Genotype 1 produces a phenotype with the lowest value in Environment A but the highest value in Environment C. There is significant genetic variation for the characters in Environments A and C, but no genetically based variation in Environment B.

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References

Abrams PA and Ludwig D (1995) Optimality theory, Gompertz’ law and the disposable soma theory of senescence. Evolution 49(6): 1055–1066.

Carey JR, Liedo P, Müller HG, Wang JL and Vaupel JW (1998) Dual modes of aging in mediterranean fruit fly females. Science 281: 996–998.

Charlesworth B (1994) Evolution in Age‐Structured Populations. Cambridge: Cambridge University Press.

Cole LC (1954) The population consequence of life history phenomena. Quarterly Review of Biology 29: 103–137.

Euler L (1760) Recherches generales sur la mortalite: la multiplication du genre humain. Mem. Acad. Sci., Berlin 16: 144–164.

Falconer DS and Mackay TFC (1996) Introduction to Quantitative Genetics, 4th edn. Essex: Longman.

Fisher RA (1930) The Genetical Theory of Natural Selection. Oxford: Clarendon Press.

Hamilton WD (1966) The moulding of senescence by natural selection. Journal of Theoretical Biology 12: 12–45.

Houle D (1992) Comparing evolvability and variability of quantitative traits. Genetics 130: 195–204.

Lotka AJ (1907) Studies on the mode of growth of material aggregates. American Journal of Science 24: 199–216; 375–376.

Medawar PB (1952) An Unsolved Problem in Biology. London: H. K. Lewis.

Pearson K (1901) On the change in expectation of life in man during a period of circa 2000 years. Biometrika 1: 261–264.

Rose MR (1991) The Evolutionary Biology of Aging. Oxford: Oxford University Press.

Roff DA (1986) Predicting body size with life history models. Bioscience 36(5): 316–323.

Sgro CS and Partridge L (1999) A delayed wave of death from reproduction in Drosophila. Science 286: 2521–2524.

Stearns SC (1992) The Evolution of Life Histories. New York: Oxford University Press.

Stearns SC and Crandall RE (1981) Quantitative predictions of delayed maturity. Evolution 35: 455–463.

Stearns SC and Koella J (1986) The evolution of phenotypic plasticity in life‐history traits: predictions for norms of reaction for age‐ and size‐at‐maturity. Evolution 34: 65–75.

Vieira C, Pasyukova EG, Zeng ZB et al. (2000) Genotype–environment interaction for quantitative trait loci affecting life span in Drosophila melanogaster. Genetics 154: 213–227.

Weismann A (1889) Essays Upon Heredity and Kindred Biological Problems. Oxford: Clarendon Press.

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Pletcher, Scott D(Jun 2001) Genetics and Variation in Survival and Reproduction. In: eLS. John Wiley & Sons Ltd, Chichester. http://www.els.net [doi: 10.1038/npg.els.0003313]