数字农科院2.0

Classification Of Soybean Genotypes Assessed Under Different Water Availability And At Different Phenological Stages Using Leaf-Based Hyperspectral Reflectance

文献类型： 外文期刊

作者： Crusiol; LGT; Nanni; MR; Furlanetto; RH; Sibaldelli; RNR; Cezar; E; Sun; L; Foloni; JSS; Mertz-Henning; LM; Nepomuceno; AL; Neumaier; N; Farias; JRB

关键词： Glycine Max (L; ) Merrill; Drought Stress; Phenological Stages; Soybean Varieties; Spectral Signature; Principal Component Analysis; Linear Discriminant Analysis; Hyperspectral Reflectance

期刊名称： Remote Sensing

ISSN： 2072-4292

年卷期： 2021 年 13 卷 2 期

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： Monitoring of soybean genotypes is important because of intellectual property over seed technology, better management over seed genetics, and more efficient strategies for its agricultural production process. This paper aims at spectrally classifying soybean genotypes submitted to diverse water availability levels at different phenological stages using leaf-based hyperspectral reflectance. Leaf reflectance spectra were collected using a hyperspectral proximal sensor. Two experiments were conducted as field trials: one experiment was at Embrapa Soja in the 2016/2017, 2017/2018, and 2018/2019 cropping seasons, where ten soybean genotypes were grown under four water conditions; and another experiment was in the experimental farm of Unoeste University in the 2018/2019 cropping season, where nine soybean genotypes were evaluated. The spectral data collected was divided into nine spectral datasets, comprising single and multiple cropping seasons (from 2016 to 2019), and two contrasting crop-growing environments. Principal component analysis, applied as an indicator of the explained variance of the reflectance spectra among genotypes within each spectral dataset, explained over 94% of the spectral variance in the first three principal components. Linear discriminant analysis, used to obtain a model of classification of each reflectance spectra of soybean leaves into each soybean genotype, achieved accuracy between 61% and 100% in the calibration procedure and between 50% and 100% in the validation procedure. Misclassification was observed only between genotypes from the same genetic background. The results demonstrated the great potential of the spectral classification of soybean genotypes at leaf-scale, regardless of the phenological stages or water status to which plants were submitted.

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