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Zinnia marylandica (Asteraceae: Heliantheae), a new disease-resistant ornamental hybrid

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Abstract

Zinnia marylandica, an artificial hybrid betweenZ. angustifolia var.angustifolia (2n=22 female) andZ. violacea (2n=24, male), is described and illustrated.Zinnia marylandica is a stabilized amphiploid (2n=46) produced by colchicine-induced doubling of the sterile interspecific hybrids. It exhibits disease resistance to powdery mildew (Erysiphe cichoracearum), alternaria blight (Alternaria zinniae), and bacterial leaf and flower spot (Xanthomonas campestris pv.zinniae).

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Authors and Affiliations

  1. Vegetable Crops Research Unit, Agricultural Research Service, USDA, 53706, Madison, WI

    David M. Spooner

  2. Department of Horticulture, University of Wisconsin, 53706, Madison, WI

    David M. Spooner & Dennis P. Stimart

  3. Department of Plant and Soil Science, University of Massachusetts, 01003, Amherst, MA

    Thomas H. Boyle

Authors
  1. David M. Spooner
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  2. Dennis P. Stimart
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  3. Thomas H. Boyle
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Spooner, D.M., Stimart, D.P. & Boyle, T.H. Zinnia marylandica (Asteraceae: Heliantheae), a new disease-resistant ornamental hybrid. Brittonia 43, 7–10 (1991). https://doi.org/10.2307/2807169

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  • DOI: https://doi.org/10.2307/2807169

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