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    Author(s): F. Thomas Ledig
    Date: 1999
    Source: Diversity and Distributions 5:77-90
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (287 KB)


    Pinus sabiniana Dougl. (grey pine) forms savanna forests in the foothills surrounding California’s Great Central Valley. However, its fossil record, which dates from the late Miocene through the Pliocene and Pleistocene, is found exclusively in southern California, south of the species’ present range. A total of twenty-nine isozyme loci, representing eighteen enzyme systems, was assayed to analyse the genetic structure in eight populations of grey pine and attempt to track its migration history from southern to northern California. Expected heterozygosity in the two southernmost samples was 0.128 and 0.150, and heterozygosity tended to decrease with increasing latitude, suggesting the loss of diversity as grey pine dispersed northward.

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    Ledig, F. Thomas. 1999. Genic diversity, genetic structure, and biogeography of Pinus sabiniana Dougl. Diversity and Distributions 5:77-90


    Pinus sabiniana, migration, biogeography, genetic variation, isozymes

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