Genetic polymorphism in a temporally varying environment: Effects of delayed germination or diapause

P. W. Hedrick

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Temporal variation in the environment is generally thought to be less efficient in maintaining genetic polymorphism than spatial variation. However, if there is delayed germination or diapause, in some situations the conditions for genetic polymorphism are greatly broadened in a temporally variable environment. For a model with absolute dominance which means that there can be no type of heterozygous advantage, the upper bound is no longer the geometric mean and the lower bound may not be the arithmetic mean of the fitnesses over environments. In some situations, there is an unstable equilibrium present as well as the stable equilibrium.

Original languageEnglish (US)
Pages (from-to)164-170
Number of pages7
JournalHeredity
Volume75
Issue number2
DOIs
StatePublished - Aug 1995

Keywords

  • Diapause
  • Genetic polymorphism
  • Germination
  • Seed bank
  • Variable environments

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

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