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Resistance and Tolerance to Alfalfa Mosaic Virus in Alfalfa. Pat Crill, Department of Plant Pathology, University of Wisconsin, Madison 53706, Present address of senior author: University of Florida, Gulf Coast Experiment Station, Bradenton, Florida 33501; E. W. Hanson, and D. J. Hagedorn, Department of Plant Pathology, University of Wisconsin, Madison 53706. Phytopathology 61:369-371. Accepted for publication 3 November 1970. DOI: 10.1094/Phyto-61-369.

Resistance and tolerance to alfalfa mosaic virus (AMV) in alfalfa (Medicago sativa L.) were observed in commonly grown cultivars. Resistance to AMV strain 1234-5670 was shown to be controlled by a recessive gene. Susceptible clones varied in reaction to AMV, but one clone was shown to be highly tolerant to strain 1234-5670.

Additional keywords: alfalfa clones, am-1 gene controls resistance.