Deleterious Effects of White Seed due to p Gene in Beans

Abstract

Isogenic white-seeded (WS) lines of common bean (Phaseolus vulgaris L.) were developed from colored seeded (CS) lines by backcrossing and mutagenesis. Each CS line was selected for its specific resistance to Pythium, Fusarium, Rhizoctonia, seed corn maggot, mechanical damage, or cold tolerance. In all instances, the WS lines, with the p gene, were inferior to the CS lines with P.