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Population biology of Avena XI. Variation in peripheral isolates of A. barbata

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Abstract

Data on genetic polymorphism, scored at two morphological loci, showed peripheral, isolated roadside colonies of slender oat (Avena barbata) to be significantly less polymorphic than the large central populations in continuous stands. The role of random drift (founder effect) was evident in the genetic structure of such roadside colonies which were, however, not monomorphic. Multilocus associations also suggested large Hill-Robertson effect in generating gametic disequilibria. Such isolates with varying amounts of elapsed time since the founder events could offer useful material for a study of evolutionary processes including the selection-drift balance.

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Author notes

  1. K. N. Rai

    Present address: Millet Breeding, ICRISAT, Hyderabad, A.P., India

  2. R. S. Singh

    Present address: Department of Biology, McMaster University, Hamilton, Ontario, Canada

Authors and Affiliations

  1. Department of Agronomy and Range Science, University of California, 95616, Davis, CA, USA

    S. K. Jain, K. N. Rai & R. S. Singh

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  1. S. K. Jain
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  2. K. N. Rai
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  3. R. S. Singh
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Jain, S.K., Rai, K.N. & Singh, R.S. Population biology of Avena XI. Variation in peripheral isolates of A. barbata. Genetica 56, 213–215 (1981). https://doi.org/10.1007/BF00057562

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  • DOI: https://doi.org/10.1007/BF00057562

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