Inheritance of resistance to Fusarium root rot in three common bean genotypes

Abstract: 
Fusarium solani f. sp phaseoli (FSP) is an important disease in Uganda causing in some cases 100% yield losses in beans. The study established the nature of inheritance to FSP resistance in genotypes RWR 719, NABE 14 and NABE 13. A 5x5 full diallel design involving three resistant and two susceptible genotypes was used to develop F1 and F2 populations which were inoculated with FSP isolate. Crosses, GCA and SCA values were significant, suggesting importance of both additive and dominance variances but additive variance was larger. Chisquare test conformed to 2-3 gene models with dominance/ epistasis and heritability (h2NS) was estimated at 0.77.
Fusarium solani f. sp phaseoli (FSP) est une maladie importante en Ouganda causant dans certains cas des pertes de rendement de 100% dans les haricots. L’étude a établi la nature de la transmission à la résistance de FSP dans les génotypes RWR 719, le NABE 14 et le NABE 13. Une pleine conception du diallële 5x5 impliquant trois génotypes résistants et deux genotypes sensibles a été employée pour développer les populations F1 et F2 qui ont été inoculées avec FSP isolé. Les valeurs de croisement, de GCA et de SCA étaient significatives, suggérant l’importance de la variance additive et celle de dominance mais la variance additive était plus grande. Le test de Chi-carré s’est conformé à 2 ou 3 modèles de gène avec la dominance/suppression d’un caractère héréditaire et l’héritabilité (h2 NS) a été estimée à 0.77.
Language: 
Date of publication: 
2010
Country: 
Region Focus: 
East Africa
Collection: 
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Form: 
Printed resource
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ISSN: 
E_ISSN: 
Edition: 
Extent: 
453-456
Notes: 

 

"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 stakeholers 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 plant breeding".