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ISSN : 2456-8643

Title:
EVALUATION OF INTRODUCED BEAN GENOTYPES FOR ADAPTABILITY AND ROOT ROT RESISTANCE IN RWANDA

Authors:
Floride Mukamuhirwa , Louis Butare , James Kelly , Bancy Waweru , Theogene Niyibigira , and Godelive Mukamurezi, Rwanda

Abstract:
Common bean (Phaseolus vulgaris) is an important food crop in Rwanda as it contributes to food security and income generation. Resistance to root rot disease in introduced genotypes is insufficient for consideration as superior without evaluation for yield potential. The objective of this study was to evaluate the performance of different introduced genotypes under Rwandan conditions and to assess their resistance to bean root rot diseases. A total number of 570 genotypes including 300 genotypes introduced from CIAT coded ADP, 18 locally developed inbred lines high iron and zinc content and 252 genotypes introduced from Michigan State University (MSU) were evaluated in Rubona and Akanyirandoli experimental sites of Rwanda Agriculture and Animal Resources Development Board. Out of the 300 introduced genotypes, 76 candidates were selected for future intermediate trials. Among the 76 genotypes evaluated during intermediate trials, 5 genotypes including ADP47, ADP48, ADP53, ADP57 and ADP93 were selected based on yield performance for further evaluation in advanced yield trials. All ADP lines performed poorly compared to the rest of tested entries. Only ADP48 was kept for further evaluation due to its superior performance which was twice that of other ADP lines. The best locally bred materials included 2015AN004, 2015AN012, 2015AN15, 2015AN011, 2015AN010, and 2015AN005 with a mean yield ranging between 1083 and 1449 kg ha-1. Among the 252 introduced genotypes from MSU, though none survived the stress under field conditions, 15 were found to be resistant, 115 were tolerant and 122 were susceptible to the endemic root rot diseases in Rwanda.

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