Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 8:265-266 (1968)
© 1968 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Evaluation of Selected Alfalfa Clones for Resistance to Sclerotinia trifoliorum Eriks.1

J. H. Elgin, Jr. and E. H. Beyer2

Eighty-two selected alfalfa clones and polycross progeny of 71 of these were inoculated with S. trijoliorum in a controlled growth chamber. All clones and their progeny were susceptible to attack, but significant diffences in susceptibility were observed. Some promise for a selection program for an increased level of resistance was indicated by a positive association of clonal and progeny means.

Key Words: Sclerotinia trifoliorum Eriks • Medicago sativa L. • selection for resistance to Sclerotinia

1 Cooperative investigation between the Maryland Agricultural Experiment Station and the Crops Research Division, ARS, USDA. Contribution No. 3965 and Scientific Article No. A-1377 of the Maryland Agricultural Experiment Station, Department of Agronomy. Condensed from a thesis Submitted to the Graduate School, University of Maryland in partial fulfillment of the requirements for the M.S. Degree.

2 Assistant Research Agronomist, Crops Research Division, ARS, USDA, U. S. Regional Pasture Research Laboratory, University Park, Pa., 16802; and former Assistant Professor of Agronomy, University of Maryland (now Research Director, Farm Seed Research Corporation, San Juan Bautista, Calif. 95045).

Received for publication August 31, 1967.




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