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Variation in the genetic structure and reproductive biology of holm oak populations

  • Part B: Structure, Productivity and Dynamic
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Abstract

Five polymorphic enzymatic loci were studied in 30 populations of Quercus ilex distributed from Crete to North Africa. A high within-population genetic diversity was found for each locus studied. Most of the alleles were common to all the populations, indicating that the holm oak corresponds to a single genetic entity. Observation of breeding system characteristics showed that the holm oak is monoecious, wind-pollinated, and likely to possess genetic autoincompatibility. Furthermore, studies of flowering phenology in a single population showed that the period of flowering varied notably among trees. An average of 29% of the trees showed inter-annual variation in flowering time. The male, female or vegetative investment also varied widely among trees from one year to another. This results in a diversification of pollen source received by a given tree each year, and also from one year to another.

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Authors and Affiliations

  1. Centre d'Ecologie Fonctionnelle et Évolutive Louis Emberger, CNRS, B.P. 5051, F-34033, Montpellier Cedex 1, France

    H. Michaud, R. Lumaret & F. Romane

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  1. H. Michaud
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  2. R. Lumaret
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  3. F. Romane
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Michaud, H., Lumaret, R. & Romane, F. Variation in the genetic structure and reproductive biology of holm oak populations. Vegetatio 99, 107–113 (1992). https://doi.org/10.1007/BF00118215

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