Naturally occurring resistance to powdery mildew in seedlings of Cornus florida

Two production nursery fields of flowering dogwood, Cornus florida L., seedlings with a high incidence of powdery mildew were surveyed for plants free of symptoms and signs of the disease. In greenhouse trials most of the seedlings selected in the field survey for being free of powdery mildew were f...

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Bibliographic Details
Published in:Journal of environmental horticulture 1998-09, Vol.16 (3), p.173-177
Main Authors: Windham, M.T. (Tennessee Agricultural Experiment Station, Knoxville, TN.), Witte, W.T
Format: Article
Language:English
Subjects:
CORNUS FLORIDA
DISEASE RESISTANCE
ENFERMEDADES FUNGOSAS
ENSAYO
FUNGAL DISEASES
GERMOPLASMA
GERMPLASM
MALADIE FONGIQUE
MICROSPHAERA PULCHRA
PARTIAL RESISTANCE
PLANTULAS
PLANTULE
RESISTANCE AUX MALADIES
RESISTENCIA A LA ENFERMEDAD
SCREENING
SEEDLINGS
TENNESSEE
TESTAGE
TESTING
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Summary:Two production nursery fields of flowering dogwood, Cornus florida L., seedlings with a high incidence of powdery mildew were surveyed for plants free of symptoms and signs of the disease. In greenhouse trials most of the seedlings selected in the field survey for being free of powdery mildew were found to be escapes (had no disease resistance) or to exhibit partial resistance (unacceptable low levels of resistance). In those trials, twenty seedlings, representing approximately 0.1% of the seedlings examined in the field surveys, displayed resistance to powdery mildew similar to that of C. florida ‘Cherokee Brave’. This group of disease resistant seedlings will be used to develop new cultivars of white flowering dogwood resistant to powdery mildew and to investigate the inheritance of powdery mildew resistance mechanisms in flowering dogwood.
ISSN:0738-2898
2573-5586
DOI:10.24266/0738-2898-16.3.173