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

dc.creatorTadesse, B.
dc.creatorDas, B.
dc.creatorKosgei, T.
dc.creatorAmsal Tesfaye Tarekegne
dc.creatorLabuschagne, M.
dc.creatorRegasa, M.W.
dc.creatorOlsen, M.
dc.creatorChaikam, V.
dc.creatorGowda, M.
dc.date2022-02-18T01:05:17Z
dc.date2022-02-18T01:05:17Z
dc.date2022
dc.date.accessioned2023-07-17T20:08:55Z
dc.date.available2023-07-17T20:08:55Z
dc.identifierhttps://hdl.handle.net/10883/21978
dc.identifier10.3390/agronomy12020438
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7513744
dc.descriptionBreeding 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.
dc.languageEnglish
dc.publisherMDPI
dc.relationhttps://www.mdpi.com/article/10.3390/agronomy12020438/s1
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationPlant Health
dc.relationGenetic Innovation
dc.relationResilient Agrifood Systems
dc.relationBill & Melinda Gates Foundation
dc.relationUnited States Agency for International Development
dc.relationCGIAR Research Program on Maize
dc.relationhttps://hdl.handle.net/10568/126529
dc.rightsCIMMYT manages Intellectual Assets as International Public Goods. The user is free to download, print, store and share this work. In case you want to translate or create any other derivative work and share or distribute such translation/derivative work, please contact CIMMYT-Knowledge-Center@cgiar.org indicating the work you want to use and the kind of use you intend; CIMMYT will contact you with the suitable license for that purpose
dc.rightsOpen Access
dc.source2
dc.source12
dc.source2073-4395
dc.sourceAgronomy
dc.source438
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectNitrogen Use Efficiency
dc.subjectGrain Yield
dc.subjectOil Content
dc.subjectStarch Content
dc.subjectCorrelation
dc.subjectKernel Weight
dc.subjectLow Nitrogen
dc.subjectNITROGEN
dc.subjectUSE EFFICIENCY
dc.subjectGRAIN
dc.subjectPROTEIN CONTENT
dc.subjectLIPID CONTENT
dc.subjectSTARCH
dc.subjectKERNELS
dc.titleRelationship between grain yield and quality traits under optimum and low-nitrogen stress environments in tropical maize
dc.typeArticle
dc.typePublished Version
dc.coverageBasel (Switzerland) MDPI,


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