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Published in Crop Sci 6:324-326 (1966)
© 1966 Crop Science Society of America
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Inheritance of Resistance to Bacterial Blight (Pseudomonas glycinea Coerper) in Soybeans ( Glycine max L. )1

Debabrata Mukherjee, J. W. Lambert, R. L. Cooper and B. W. Kennedy2

Parents and F3 families of seven soybean crosses were studied for reaction to the bacterial blight organism, Pseudomonas glycinea Coerper. Six of the crosses were tested in both the field and the greenhouse to a single colony isolate of the organism obtained at St. Paul, Minnesota, and four were tested under similar conditions to an isolate from Morris, Minnesota.

The two isolates gave distinctly different reactions on the populations studied, indicating the presence of pathogenic races. Also, varietal reactions varied somewhat with the environments used in testing.

Resistance to the St. Paul isolate, designated race 1, was attributed to a single dominant gene, possessed by the varieties ‘Norchief,’ ‘Harosoy,’ and P.I. 132,207. The proposed symbol for this gene is Rpg1. The inheritance of resistance to the Morris isolate, race 2, appeared to involve more than one gene. Delineation of detail, however, must await further study.

1 Paper No. 5838 Scientific Journal Series, Minnesota Agricultural Experiment Station, University of Minnesota, St. Paul, Minnesota. Part of a thesis submitted to the University of Minnesota in partial fulfillment of the requirements for the Ph.D. degree.

2 Former graduate student, Professor, and Research Associate, Department of Agronomy and Plant Genetics; and Assistant Professor, Department of Plant Pathology and Physiology, University of Minnesota.

Received for publication December 3, 1965.


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T. Huynh, D Dahlbeck, and B. Staskawicz
Bacterial blight of soybean: regulation of a pathogen gene determining host cultivar specificity
Science, September 22, 1989; 245(4924): 1374 - 1377.
[Abstract] [PDF]


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