Grain filling patterns of CIMMYT early maize inbred lines

Despite the ability of early maize to escape drought and provide food early, it yields 20-30% less than late maize. The challenge is to increase yield while maintaining earliness. A study is ongoing at CIMMYT, Harare to determine whether grain fill rate and duration can be used as selection criteria for yield. Fifteen early maize inbred lines characterized revealed genetic variations in grain fill rate and duration that was correlated to yield implying that they are a better method for indirect selection for yield. Therefore, a great potential for increasing the yield of early maize exist using indirect selection methods.
En dépit de la capacité du maïs précoce d’échapper à la sécheresse et de fournir la nourriture tôt, il rapporte 20-30% de moins que le maïs tardif. Le défi est d’augmenter le rendement tout en maintenant la précocité. Une étude est en cours à CIMMYT- Harare pour déterminer si le taux et la durée de suffisance de grain peuvent être employés comme critères de selection pour le rendement. Quinze souches pures de maïs précoce caractérisées ont indiqué des variations génétiques du taux et de la durée de suffisance de grain qui a été corrélée au rendement en impliquant qu’elles constituent une meilleure méthode pour la selection indirecte pour le rendement. Par conséquent, un grand potentiel pour augmenter le rendement de maïs précoce existe en utilisant des méthodes de selection indirectes.
Date of publication: 
Region Focus: 
Southern Africa
RUFORUM Conferences and Workshops
Licence conditions: 
Open Access
Access restriction: 
Printed resource
"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".