Abstract: In this study we identified the feature wavebands for rice samples grown in experimental fields located in Wuchang, Jiamusi and Qiqihar in 2015 to examine the application of diffuse reflectance Fourier transform near infrared (FT-NIR) spectroscopy combined with chemometrics for identifying the traceability of the geographical indication products Chahayang rice and Wuchang rice harvested in 2014 and 2015. The results showed that the rice samples from different regions were significantly different in the wavenumber region of 5 136–5 501 cm-1. The predictive accuracy of the developed qualitative analysis model was 100% for both Chahayang rice and Wuchang rice harvested in 2014, and 100% and 91.67% for Chahayang rice and Wuchang rice harvested in 2015, respectively. The accuracy of the quantitative prediction model established by partial least squares method was 90.90% and 95.83% for Chahayang rice and Wuchang rice harvested in 2014, and 91.67% and 87.50% for Chahayang rice and Wuchang rice harvested in 2015, respectively.

Key words: near infrared diffuse reflectance spectroscopy, rice, origin, qualitative analysis, quantitative analysis