Linear discriminant analysis reveals differences in root architecture in wheat seedlings by nitrogen uptake efficiency

Kenobi, Kim and Atkinson, Jonathan A. and Wells, Darren M. and Gaju, Oorbessy and deSilva, Jayalath G. and Foulkes, M. John and Dryden, Ian L. and Wood, Andrew T.A. and Bennett, Malcolm J. (2017) Linear discriminant analysis reveals differences in root architecture in wheat seedlings by nitrogen uptake efficiency. Journal of Experimental Botany . ISSN 1460-2431

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Abstract

Root architecture impacts water and nutrient uptake efficiency. Identifying exactly which root architectural properties influence these agronomic traits can prove challenging. In this paper approximately 300 wheat plants were divided into four groups using two binary classifications, high vs. low nitrogen uptake efficiency (NUpE), and high vs. low nitrate in medium. The root system architecture for each wheat plant was captured using 16 quantitative variables. The multivariate analysis tool, linear discriminant analysis, was used to construct composite variables, each a linear combination of the original variables, such that the score of the wheat plants on the new variables showed the maximum between-group variability. The results show that the distribution of root system architecture traits differ between low and high NUpE wheat plants and, less strongly, between low NUpE wheat plants grown on low vs. high nitrate media.

Item Type: Article
Keywords: Linear discriminant analysis, Mahalanobis distance, Nitrogen uptake efficiency, Plant phenotyping, Root system architecture, Watkins lines, Wheat root biology
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Biosciences > Division of Plant and Crop Sciences
University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
Identification Number: 10.1093/jxb/erx300
Depositing User: Atkinson, Jonathan
Date Deposited: 09 Aug 2017 12:48
Last Modified: 12 Oct 2017 23:24
URI: http://eprints.nottingham.ac.uk/id/eprint/44796

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