Breeding bean for resistance to diseases
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Seven bean (Phaseoulus vulgaris L.) lines contrasting in disease resistance and agronomic characters were crossed in a diallel. The parents, F(1s), F(2s) and F(3s) were evaluated and selected in glasshouse and field for resistance to rust, Uromyces phaseoli (Reben) Wint, anthracnose (Colletotrichum lindemuthianum), angular leaf spot (Phaeoisariopsis griseola), halo blight (Pseudomonas phaeolicola) and bean common mosaic virus (BCMV). F(4s) and F(5s) were evaluated in the field only. Several F4 and F5 lines combining resistance to three or more diseases, acceptable seed characteristics and good yield potential were selected from nine crosses.