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Relationship between grain yield and quality traits under optimum and low-nitrogen stress environments in tropical maize

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Title Relationship between grain yield and quality traits under optimum and low-nitrogen stress environments in tropical maize
 
Creator Ertiro, Berhanu Tadesse
Das, Biswanath
Kosgei, Titus
Tarekegne, Amsal
Labuschagne, Maryke T.
Worku, Mosisa
Olsen, Michael
Chaikam, Vijay
Gowda, Manje
 
Subject nitrogen
use efficiency
grain
protein content
lipid content
starch
kernels
 
Description Breeding for nitrogen use efficiency (NUE) is important to deal with food insecurity and its effect on grain quality, particularly protein. A total of 1679 hybrids were evaluated in 16 different trials for grain yield (GY), grain quality traits (protein, starch and oil content) and kernel weight (KW) under optimum and managed low soil nitrogen fields in Kiboko, Kenya, from 2011 to 2014. The objectives of our study were to understand (i) the effect of low soil N stress on GY and quality traits, (ii) the relationship between GY and quality traits under each soil management condition and (iii) the relationship of traits with low-N versus optimum conditions. From the results, we observed the negative effects of low N on GY, KW and the percentage of protein content, and a positive effect on the percentage of starch content. The correlation between GY and all quality traits was very weak under both soil N conditions. GY had a strong relationship with KW under both optimum and low soil N conditions. Protein and starch content was significantly negative under both optimum and low-N conditions. There was no clear relationship among quality traits under optimum and low N, except for oil content. Therefore, it seems feasible to simultaneously improve GY along with quality traits under both optimum and low-N conditions, except for oil content. However, the negative trend observed between GY (starch) and protein content suggests the need for the regular monitoring of protein and starch content to identify varieties that combine both high GY and acceptable quality. Finally, we recommend further research with a few tropical maize genotypes contrasting for NUE to understand the relationship between the change in grain quality and NUE under low-N conditions.
 
Date 2022-02-10
2023-01-04T08:08:56Z
2023-01-04T08:08:56Z
 
Type Journal Article
 
Identifier Ertiro, B.T., Das, B., Kosgei, T., Tesfaye, A.T., Labuschagne, M.T., Worku, M., Olsen, M.S., Chaikam, V. and Gowda, M. 2022. Relationship between grain yield and quality traits under optimum and low-nitrogen stress environments in tropical maize. Agronomy 12(2):438. https://hdl.handle.net/10883/21978
2073-4395
https://hdl.handle.net/10568/126529
https://hdl.handle.net/10883/21978
https://doi.org/10.3390/agronomy12020438
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format application/pdf
 
Publisher MDPI AG
 
Source Agronomy