Heterosis and combining abilities for multiple resistance to Turcicum leaf blight and maize streak virus

Fifty two single crosses were evaluated for resistance to Turcicum Leaf blight (TLB) and Maize Streak Virus (MSV) resistance across several locations in Uganda in 2009. The crosses were grown in 1-row plots with 2 replications. Subsequently108 triple crosses from the 54 F1s were evaluated in 2-row plots for both diseases and agronomic performance in multi-environments during the second season of 2009. Genotypes were considered fixed and environment random. GCA and SCA effects were significantly different among parents and among crosses. Interactions of Environment with GCA and SCA were significant for both TLB and MSV. Plant height and yield were also significantly affected by Crosses x Environment interaction.
Cinquante-deux croisements simples ont été évalués pour la résistance à la brûlure des feuilles de Turcicum (TLB) et à la résistance du virus de strie du maïs (MSV) dans plusieurs endroits de l’Ouganda en 2009. Les croix ont été cultivées dans des parcelles à 1 ligne avec 2 répétitions. Par la suite, 108 croix triples de 54 F1s ont été évaluées dans des parcelles à 2 lignes pour les deux maladies et les performances agronomiques dans des environnements multiples pendant la deuxième saison de 2009. Les génotypes ont été considérés comme fixes et d’environnement aléatoire. Les effets de GCA et SCA étaient significativement différentes entre les parents et les croix. Les interactions de l’environnement avec GCA et SCA ont été significatives pour TLB et MSV. La hauteur de la plante et le rendement ont également été considérablemen
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"