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This article in CS

  1. Vol. 17 No. 3, p. 477-479
    Received: Sept 20, 1976

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Serpentine Sunflower, Helianthus Exills, as a Genetic Resource1

  1. S. K. Jain,
  2. A. M. Olivieri and
  3. J. Fernandez-Martinez2



The common weedy species Helianthus bolanderi Gray and a rare endemic, H. exilis Gray, were studied comparatively for population variation and ecology. Seeds from nature and from populations grown in a greenhouse were used in germination tests and fatty acid analysis of oil. The potential value of H. exilis as a genetic resource resides in its higher linoleic acid content in oil and germination polymorphism related to the response to red/far-red light and low temperatures that may be useful in eliminating dormancy problems.

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