Genetic diversity and path analysis for nitrogen use efficiency of tropical popcorn (Zea mays ssp. everta) inbred lines in adult stage

Genetic diversity and path analysis for nitrogen use efficiency of tropical popcorn (Zea mays ssp. everta) inbred lines in adult stage

Modern 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 for NUE, assess its genetic diversity for NUE and related traits, and investigate the relationship between vegetative and ad...

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Bibliographic Details
Published in:Plant breeding Vol. 137; no. 6; pp. 839 - 847
Main Authors: Almeida, Vinícius Costa, Viana, José Marcelo Soriano, DeOliveira, Henrique Morais, Risso, Leonardo Alves, Ribeiro, Aloísio Fernando Silva, DeLima, Rodrigo Oliveira, Lübberstedt, Thomas
Format: Journal Article
Language:English
Published: Berlin Wiley Subscription Services, Inc 01-12-2018
Subjects:
abiotic stress
Chlorophyll
Corn
Efficiency
Genetic analysis
Genetic diversity
Grain
Inbreeding
leaf chlorophyll content
N dynamic
Nitrogen
nitrogen use efficiency
Plant breeding
root traits
Utilization
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Summary:Modern 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 for NUE, assess its genetic diversity for NUE and related traits, and investigate the relationship between vegetative and adult traits with NUE, under contrasting N levels. Nineteen inbreds were assessed for NUE and 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 for NUE. Vegetative N uptake and utilization efficiency, and total root length can be used for early selection of superior NUE inbreds.
ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.12650