Nitrogen-use-efficient maize hybrids for low-input farming in africa

Overview

This solution addresses a critical challenge for African agriculture: producing high maize yields under limited nitrogen fertilizer availability. The University of Ghana has developed a maize breeding program focused on nitrogen-use-efficiency (NUE), combining molecular and conventional genetic approaches to identify inbred lines with genes for both high nitrogen-uptake-efficiency and nitrogen-utilization-efficiency. These lines have been used to generate single-cross hybrids that maintain strong grain yield performance even when nitrogen inputs are reduced, offering significant value to smallholder farmers, seed companies, and agricultural development programs across the continent.

Technical specifications

Breeding approach:

• Molecular and conventional genetic methods to identify inbred lines with NUE genes
• Generation of 96 single-cross hybrids from 24 selected inbred lines
• Testing against 4 commercial check hybrids for performance benchmarking

Validation methodology:

• Field trials conducted in a 10 x 10 lattice design with 2 replications
• Evaluation under low nitrogen (30 kg/ha) and high nitrogen (120 kg/ha) fertilizer regimes
• ANOVA analysis confirming significant genetic variances for grain yield and NUE traits
• GGE biplot analysis identifying hybrids with high yield and stability across fertilizer conditions
• Several hybrids out-yielded commercial checks under both nitrogen regimes

Future validation plans:

• Advanced yield trials of the top 5 hybrids over 2 years
• Multi-location testing under low and high nitrogen inputs
• Goal of identifying the best 2 hybrids for promotion and commercial release in Ghana and Africa

Technology readiness level

The technology is at an advanced development stage. Preliminary yield trials have been completed with statistically significant results confirming genetic variation for NUE and yield traits. Several promising hybrids have been identified that outperform commercial checks. The program is now seeking funding to advance to multi-location, multi-year advanced yield trials, which represents the final validation stage before commercial release and deployment to farmers.