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- Author or Editor: Eliane Augustin x
- Journal of the American Society for Horticultural Science x
Abstract
A new method of inoculation of bean seedlings with urediospores of Uromyces phaseoli typica Arth. produced an even distribution of numerous pustules on the leaves. A suspension of urediospores in Freon-113 was sprayed on both surfaces of the primary leaves. The plants were then placed in a moist chamber for 18 hr under a low light intensity of 2 × 10-5µ einsteins cm2 sec-1, before being transferred to the greenhouse. In screening tests the cvs. Great Northern 1140 and Kentucky Wonder Wax No. 765 were resistant to Brazilian race B11; ‘GN 1140’ showed the highest grade of resistance. Segregation for the reaction to rust race B11 in the F2 generation in crosses between the resistant cv. GN 1140 and 4 susceptible lines indicated that a major gene controlled the reaction with the resistant reaction dominant. The symbol RB11 was assigned to the dominant allele. Linkage was not detected between genes controlling plant habit and disease reaction.