Abstract
AbstractModern maize hybrid breeding is also focused on increasing nitrogen use efficiency (NUE) for grain production. The objectives of this study were to assess popcorn inbred lines forNUE, assess its genetic diversity forNUEand related traits, and investigate the relationship between vegetative and adult traits withNUE, under contrasting N levels. Nineteen inbreds were assessed forNUEand related traits under two contrasting N levels in a 2‐year experiment, using complete blocks with three replications. Path analysis was performed using the vegetative N uptake and utilization efficiency and two root traits and four adult traits. The inbred 05‐388 was the most efficient in N use under both N levels. The inbreds with higher N use and utilization efficiency, grain N content and post‐silking N uptake were allocated in the same cluster in both N conditions. Leaf chlorophyll content and post‐silking uptake can serve as target traits for identifying superior inbred lines forNUE. Vegetative N uptake and utilization efficiency, and total root length can be used for early selection of superiorNUEinbreds.
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