| Abstract
| - The potential of near infrared spectroscopy (NIRS) for determining the acid detergent fiber (ADF) inthe seed of oilseed Brassica (fam. Brassicaceae) was assessed. One hundred and fifty accessionsbelonging to the species Indian mustard (Brassica juncea L. Czern.& Coss.), Ethiopian mustard (B.carinata A. Braun) and rapeseed (B. napus L.) were scanned by NIRS as intact and ground seed,and their ADF values were regressed against different spectra transformations by modified partialleast squares regression. The coefficients of determination in the external validation (r2) for intactand ground seed were 0.83 and 0.85, respectively. The standard deviation to standard error ofprediction ratio and range to standard error of prediction ratio were 2.40 and 10.75 for intact seedand 2.62 and 11.76 for ground seed. No significant differences in the prediction were found for bothsample presentations. Effects of the C−H and O−H groups of lipids and water, respectively, as wellas protein and chlorophyll, were most important in modeling these equations. Keywords: Oilseed Brassica; acid detergent fiber; near-infrared spectroscopy; intact seed; ground seed
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