A New Discrimination Method of Maize Seed Varieties Based on Near-Infrared Spectroscopy
GUO Ting-ting1, 2, WANG Shou-jue1, WANG Hong-wu3，HU Hai-xiao4, AN Dong5, WU Wen-jin5, XIA Wei5, ZHAI Ya-feng6*
1. Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China 4. National Maize Improvement Center of China, China Agricultural University, Beijing 100081, China 5. College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China 6. College of Biological Sciences, China Agricultural University, Beijing 100193, China
Abstract：A new discrimination method for the maize seed varieties based on the near-infrared spectroscopy was proposed. The reflectance spectra of maize seeds were obtained by a FT-NIR spectrometer (12 000-4 000 cm-1). The original spectra data were preprocessed by first derivative method. Then the principal component analysis (PCA) was used to compress the spectra data. The principal components with the cumulate reliabilities more than 80% were used to build the discrimination models. The model was established by Ψ-3 neuron based on biomimetic pattern recognition (BPR). Especially, the parameter of the covering index was proposed to assist to discriminating the variety of a seed sample. The authors tested the discrimination capability of the model through four groups of experiments. There were 10, 18, 26 and 34 varieties training the discrimination models in these experiments, respectively. Additionally, another seven maize varieties and nine wheat varieties were used to test the capability of the models to reject the varieties not participating in training the models. Each group of the experiment was repeated three times by selecting different training samples at random. The correct classification rates of the models in the four-group experiments were above 91.8%. The correct rejection rates for the varieties not participating in training the models all attained above 95%. Furthermore, the performance of the discrimination models did not change obviously when using the different training samples. The results showed that this discrimination method can not only effectively recognize the maize seed varieties, but also reject the varieties not participating in training the model. It may be practical in the discrimination of maize seed varieties.
[1] CHEN Jian, CHEN Xiao, LI Wei, et al(陈 建, 陈 晓，李 伟, 等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008, 28(8): 1806. [2] YAN Yan-lu, ZHAO Long-lian, HAN Dong-hai, et al(严衍禄，赵龙莲，韩东海，等). Foundation and Application of Near-Infrared Spectroscopy Analysis(近红外光谱分析基础与应用). Beijing: China Light Industry Press(北京：中国轻工业出版社), 2005. [3] LU Wan-zhen, YUAN Hong-fu, XU Guang-tong, et al(陆婉珍，袁洪福，徐广通，等). Modern Near Infrared Spectroscopy Analytical Technology(Second Edition)(现代近红外光谱分析技术，第2版). Beijing: China Petrochemical Press(北京：中国石化出版社), 2007. [4] Seregély Z, Deák T, Bisztray G D. Chemometrics and Intelligent Laboratory Systems, 2004, 72: 195. [5] Cocchi M, Corbellini M, Foca G, et al. Analytica Chimica Acta, 2005, 544: 100. [6] SU Qian, WU Wen-jin, WANG Hong-wu, et al(苏 谦，邬文锦，王红武，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2009, 29(9): 2413. [7] Liu L, Cozzolino D, Cynkar W U, et al. Journal of Agricultural Food Chemistry, 2006, 54 (18): 6754. [8] Woodcock T, Downey G, Kelly J D, et al. Journal of Agricultural Food Chemistry, 2007, 55 (22): 9128. [9] Cozzolino, D, Fassio A, Restaino E, et al. Journal of Agricultural Food Chemistry, 2008, 56(1): 79. [10] Ni L J, Zhang L G, Xie J, et al. Analytica Chimica Acta, 2009, 633: 43. [11] CHU Xiao-li, YUAN Hong-fu, LU Wan-zhen(褚小立, 袁洪福, 陆婉珍). Progress in Chemistry(化学进展), 2004, 16(4): 528. [12] GUO Ting-ting, WU Wen-jin, SU Qian, et al(郭婷婷，邬文锦，苏 谦，等). Transactions of the Chinese Society of Agricultural Machinery(农业机械学报), 2009, 40: 87. [13] ZHU Xiao-li, XU Yu-peng, LU Wan-zhen(褚小立，许育鹏，陆婉珍). Chinese Journal of Analytical Chemistry(分析化学), 2008, 36(5): 702. [14] WANG Shou-jue(王守觉). Acta Electronica Sinica(电子学报), 2002, 30(10): 1417. [15] WANG S, Lai J. Neurocomputing, 2005, 67(1-4): 9. [16] WANG Shoujue. INNS, ENNS, JNNS Newsletters Elseviers, 2003, 1(1): 3. [17] WANG Shou-jue, XU Jian, WANG Xian-bao, et al(王守觉，徐 健，王宪保，等). Acta Electronica Sinica(电子学报), 2003, 31(1): 1.
