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The dynamic mating systems of conifers

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Book cover Population Genetics of Forest Trees

Part of the book series: Forestry Sciences ((FOSC,volume 42))

Abstract

Conifer mating systems vary among species and within species; both ecological variables and genetic variation cause mating systems to be dynamic. Within species, estimates of rates of outcrossing vary among populations, among loci, and among individuals within stands. The level of outcrossing varies with stand density, age, and the abundance of local and foreign pollen. Variation in the mating success of both males and females violates the assumption that populations are randomly mating and at equilibrium, and justifies more quantitative analyses of mating systems. Allelic frequencies in the pollen pool and in the pool of receptive female surfaces may vary through a season and among seasons, producing positively assortative mating in time. Seed and seedling viability selects against homozygotes for lethal alleles and favors heterozygous genotypes, biasing estimates of outcrossing. Particularly fruitful topics of research include the genetic consequences of polyembryony, differential male and female mating success, and associations between specific genotypes and floral phenology.

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Authors and Affiliations

  1. Department of Environmental, Population and Organismic Biology, The University of Colorado, Campus Box 334, Boulder, Colorado, 80309, USA

    J. B. Mitton

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  1. J. B. Mitton
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  1. Oregon State University, USA

    W. T. Adams  & Steven H. Strauss  & 

  2. Pacific Northwest Research Station, USDA Forest Service, Oregon, USA

    Donald L. Copes

  3. Shell International Petroleum Co., London, UK

    A. R. Griffin

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© 1992 Springer Science+Business Media Dordrecht

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Mitton, J.B. (1992). The dynamic mating systems of conifers. In: Adams, W.T., Strauss, S.H., Copes, D.L., Griffin, A.R. (eds) Population Genetics of Forest Trees. Forestry Sciences, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-2815-5_11

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  • DOI: https://doi.org/10.1007/978-94-011-2815-5_11

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-5251-1

  • Online ISBN: 978-94-011-2815-5

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