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Discrimination of Waxy Wheats Using Near-Infrared Hyperspectral Spectroscopy

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Abstract

Wheat (Triticum aestivum L.) carries three waxy loci (Wx-A1, Wx-B1, and Wx-D1) encoding granule-bound starch synthase (GBSS) which are related to amylose synthesis. The present study was to investigate the possibility of using near-infrared (NIR) hyperspectral spectroscopy to differentiate waxy wheat and three partial waxy wheats from wild-type wheat. Nearly 267 seeds from the same harvest year were used to obtain hyperspectral imaging maps in the near-infrared range (930–2548 nm), and then the data were analyzed based on chemometric methods. The first derivative, standard normal variable (SNV) transformation, and multivariate scattering correction (MSC) were used for spectral pretreatment. Support vector machine (SVM) and partial least square discriminant analysis (PLS-DA) and backpropagation neural network (BPNN) were applied to build discrimination models for wheat line classification. The results demonstrate that the highest classification accuracy of 98.51% for the prediction set was achieved by SVM model based on raw spectral data in full NIR region, and the classification accuracy of wild-type and partial waxy wheats all reached 100%. SVM models’ prediction accuracy (98.51%) is higher than PLS-DA and BPNN models’ (75.76% and 82.10%). The above results show that NIR hyperspectral spectroscopy combined SVM model was useful in identification of waxy and partial waxy wheats from wild-type wheat.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 31601426) and the Scientific Research Funds of Hainan University (KYQD (ZQ)-1844).

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Correspondence to Dongli Liu.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Yixuan Wu declares that she has no conflict of interest. Yonghuan Yun declares that he has no conflict of interest. Jian Chen declares that he has no conflict of interest. Wen Chen declares that she has no conflict of interest. Dongli Liu declares that she has no conflict of interest.

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Wu, Y., Yun, Y., Chen, J. et al. Discrimination of Waxy Wheats Using Near-Infrared Hyperspectral Spectroscopy. Food Anal. Methods 14, 1704–1713 (2021). https://doi.org/10.1007/s12161-021-02008-1

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  • DOI: https://doi.org/10.1007/s12161-021-02008-1

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