Equation development of protein content in living rice.

With the technique of near infrared transmittance spectroscopy(NITS),the mathematical model for quantitative analysis of protein content in living rice about Chongqing area was established by Partial Least Square(PLS).The results indicated that the standard error of calibration(SEC),standard error of cross-validation(SECV),regression squared(RSQ) and 1 minus the variance ratio(1-VR) of brown and milled rice protein were 0.252,0.247;0.256,0.278;0.953,0.946;and 0.951,0.940,respectively,the range of predictive errors about predicted value of Protein Content(PC) and lab reference value PC was-0.61~0.18 and-0.39~0.46,while correlation coefficient was 0.984 and 0.978,both of which reached significant level.The model could detect quickly and nondestructively PC of breeding materials,so the selective efficiency of breeding was greatly improved.