Abstract:
A study was conducted in 2016 at RAB Rubona in Rwanda to identify root rot resistance among
114 lines of beans. The inoculum was prepared from the most virulent isolates including
Sclerotium sp 63 collected from the District of Kamonyi in Runda sector, Rhizoctonia sp 84
collected from Ruhango District, in Byimana/Kirengeri and Fusarium sp 196 collected from
western part of Rwanda. Treatments consisting of bean lines were inoculated with the same
quantity of inoculum under greenhouse conditions in Rubona research centre of Rwanda
Agriculture and Animal Resources Development Board. The inoculum was prepared by
inoculating one petri in 300g net sterilized sorghum which were then mixed with 13.5kg of loam
sandy soil previously sterilized by steaming on firewood. Disease assessment was carried out
twenty-one days after planting. Data were analyzed using analysis of variance with GenStat. This
study showed that bean lines such as NUA 566, BOA5-1/8, CAL 96, EQUADOR 299 x G
122164 TU, EQUADOR x ACC 714, G 122164 TU x EQUADOR 299, G 12727 AB 136 x G
122164 TU, IGISUBIZO, NUA 377, RWIBARURA, RWR 1668, RWR 2154, RWV 3006 x G
122164 TU, RWV 3317, SCR 16, USCR9 x RWR 2074 x G2333 X RWR 719 F2-1-6 and RWR
3228 had the lowest disease mean scores than the local resistant check |
