Collaborative activities in networks. A. Germplasm development. 1. Uniform nurseries
1988
CIAT's Bean Program uses a 3-stage evaluation system with an equal no. of uniform nurseries to ensure that evaluated lines have commercial grain characteristics and no susceptibility to epidemic diseases such as BCMV, angular leaf spot, rust, antrachnose, and bacterial blight, which make international distribution difficult. In the 1st stage, the potential and limitations of the advanced selections are evaluated and the candidates for international and parent nurseries for germplasm breeding, selected. In the 2nd stage, the resistance of the materials is verified and their yield potential estimated. The 3rd stage entails international yield and adaptation trials of resistant lines or lines with intermediate resistance to the diseases mentioned
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