Reaction of soybeans (Glycine max) to powdery mildew (Microsphaera diffusa) has been reported to be regulated by a single gene pair Rmd rmd, with the dominant allele Rmd activating adult-plant resistance and rmd causing susceptibility. Resistance from the seedling stage on was observed in the greenhouse in several soybean cultivars, and these cultivars were resistant in the field with natural and artificial inoculation (.)
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D. G. Lohnes (1992) studied this question.