The dominant gene for physiological resistance in the wheat cultivar Uruguay to certain Australian strains of leaf rust was located on chromosome 5D by the F2 method of monosomic analysis. The gene responsible for resistance in the cultivar Transfer was confirmed to be on chromosome 6B. Possible mechanisms producing aberrant F2 ratios involving Transfer in crosses with certain susceptible cultivars are discussed.
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McIntosh et al. (1965) studied this question.
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