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. |
