Nitrogen deficiency tolerance and responsiveness of durum wheat genotypes in Ethiopia

dc.creatorTesfaye Geleta Aga
dc.creatorFetien Abay Abera
dc.creatorTufa, T.
dc.creatorAssefa, K.
dc.creatorAbeyo Bekele Geleta
dc.creatorAyana, N.G.
dc.date2023-01-14T01:20:14Z
dc.date2023-01-14T01:20:14Z
dc.date2022
dc.date.accessioned2023-07-17T20:10:04Z
dc.date.available2023-07-17T20:10:04Z
dc.identifierhttps://hdl.handle.net/10883/22403
dc.identifier10.1155/2022/9506078
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7514150
dc.descriptionDevelopment of low-nitrogen (N) tolerant and N-responsive durum wheat genotypes is required since nitrogen efficiency has emerged as a highly desirable trait from economic and environmental perspectives. Two hundred durum wheat genotypes were evaluated at three locations under optimum (ON) and low (LN) nitrogen conditions to screen genotypes for low-nitrogen tolerance and responsiveness to an optimum N supply. The results showed significant variations among the durum wheat genotypes for low-N tolerance and responsiveness. The average reduction in grain yield under the LN condition was 48.03% across genotypes. Only 17% of the genotypes tested performed well (grain yield reduction <40%) under LN conditions. Based on the absolute grain yield, biomass yield, and normalized difference vegetative index value, on average, 32, 14, 17, and 37% of the tested genotypes were classified as efficient and responsive, efficient and nonresponsive, inefficient and responsive, and inefficient and nonresponsive, respectively. Considering the absolute and relative grain yield, biomass yield, normalized difference vegetative index values, and stress tolerance indices as selection criteria, 17 genotypes were chosen for subsequent breeding. Among the screening indices, geometric mean productivity, stress tolerance index, yield index, and stress susceptibility index exhibited positive and significant correlations with grain yield under both N conditions; hence, either of these traits can be used to select low-N-tolerant genotypes. The common genotypes identified as LN-tolerant and responsive to N application in this study could be used as parental donors for developing N-efficient and responsive durum wheat varieties.
dc.languageEnglish
dc.publisherHindawi Publishing Corporation
dc.relationhttps://www.hindawi.com/journals/ija/2022/9506078/#supplementary-materials
dc.relationNutrition, health & food security
dc.relationAccelerated Breeding
dc.relationPlant Health
dc.relationGenetic Innovation
dc.relationEthiopian Institute of Agricultural Research
dc.relationMekelle University
dc.relationInternational Maize and Wheat Improvement Center
dc.relationhttps://hdl.handle.net/10568/127676
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.source2022
dc.source1687-8159
dc.sourceInternational Journal of Agronomy
dc.source9506078
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectLow-Nitrogen Tolerance
dc.subjectYield Reduction
dc.subjectTolerant Genotypes
dc.subjectParental Donors
dc.subjectNITROGEN
dc.subjectHARD WHEAT
dc.subjectGENOTYPES
dc.subjectWheat
dc.titleNitrogen deficiency tolerance and responsiveness of durum wheat genotypes in Ethiopia
dc.typeArticle
dc.typePublished Version
dc.coverageEthiopia
dc.coverageNew York (USA)


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