Genetics of resistance to bacterial leaf blight in rice germplasm in Uganda

Bacterial leaf blight (BLB) caused by Xanthomonas oryzae pv. oryzae is one of the most serious diseases of rice worldwide. The disease causes significant losses mostly in lowland rice. This study is investigating the mode of gene action of resistance to BLB using generation mean analysis. Crosses are being done between the susceptible lines (Supa) and three resistant NILs (Nerica 1, 4 and 10) upland rice. The plants will be infected artificially using a clipping inoculation technique. Severity of bacterial leaf blight on plants will be classified basing on the length of the blighted portion of the leaves using a score chart of 1 - 9. Genetic models will be used to determine whether inheritance to BLB resistance is due to dominance, additive and/or epistatic gene interactions.
La rouille bactérienne de feuille (BLB) provoquée par Xanthomonas oryzae pv. oryzae est l’une des maladies les plus sérieuses du riz dans le monde entier. La maladie cause des pertes significatives souvent dans le riz de plaine. Cette recherche étudie le mode d’action de gène de résistance à la rouille bactérienne de feuille BLB en utilisant l’analyse moyenne de génération. Des croix sont faites entre les lignées sensibles (Supa) et trois espèces de riz de montagne résistant au NILs (Nerica 1, 4 et 10). Les plantes seront infectées artificiellement en utilisant une technique d’inoculation de coupure. La sévérité de la rouille bactérienne de feuille sur des plantes sera classifiée en se basant sur la longueur de la partie enrouillée des feuilles en utilisant un diagramme de points de 1 - 9. Des modèles génétiques seront employés pour déterminer si la transmission à la résistance de BLB est due aux interactions de dominance, additives et/ou épistatiques de gène.
Date of publication: 
Region Focus: 
East Africa
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Printed resource

About the RUFORUM 2010 Biennal Conference
"The 2010 RUFORUM Biennial Conference was the second in the series. The main objective of the Biennial conferences is to provide a platform for agricultural research for development stakeholders in Africa and beyond to actively exchange findings and experiences, while at the same time learning lessons towards improving performance of the agricultural sector and ultimately people’s livelihoods. The biennial conference is RUFORUM’s most comprehensive meeting for the diversity of stakeholders in agriculture. It is especially dedicated to graduate students and their supervisors, grantees in RUFORUM member universities and alumni. It is a platform for peer review, quality control, mentorship, networking and shared learning. This record contains an extended abstract accepted under the theme of Plant Breeding"