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Evolution and Function of Heterostyly pp 1–29Cite as

Heterostylous Genetic Polymorphisms: Model Systems for Evolutionary Analysis

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Part of the book series: Monographs on Theoretical and Applied Genetics ((GENETICS,volume 15))

Abstract

Heterostyly is a genetic polymorphism in which plant populations are composed of two (distyly) or three (tristyly) morphs that differ reciprocally in the heights of stigmas and anthers in flowers (Fig. 1). The style-stamen polymorphism is usually accompanied by a sporophytically controlled, diallelic self-incompatibility system that prevents self- and intramorph fertilizations, and a suite of ancillary morphological polymorphisms, particularly of the stigmas and pollen of floral morphs. Heterostyly is reported from approximately 25 angiosperm families and has usually been viewed as a floral device that promotes outcrossing, hence reducing the harmful effects of close inbreeding in plant populations.

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  1. Department of Botany, University of Toronto, Toronto, Ontario, M5S 3B2, Canada

    S. C. H. Barrett

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    Spencer C. H. Barrett

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© 1992 Springer-Verlag Berlin Heidelberg

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Barrett, S.C.H. (1992). Heterostylous Genetic Polymorphisms: Model Systems for Evolutionary Analysis. In: Barrett, S.C.H. (eds) Evolution and Function of Heterostyly. Monographs on Theoretical and Applied Genetics, vol 15. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-86656-2_1

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  • DOI: https://doi.org/10.1007/978-3-642-86656-2_1

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-86658-6

  • Online ISBN: 978-3-642-86656-2

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