Abstract
The near-infrared spectroscopy (NIRS) combined with modified partial least squares (modified PLS) regression was used for determining the neutral detergent fiber (NDF) and the acid detergent fiber (ADF) fractions of the chickpea (Cicer arietinum L.) seed. Fifty chickpea accessions (24 desi and 26 kabuli types) and fifty recombinant inbred lines F5:6 derived from a kabuli × desi cross were evaluated for NDF and ADF, and scanned by NIRS. NDF and ADF values were regressed against different spectral transformations by modified partial least squares regression. The coefficients of determination in the cross-validation and the standard deviation from the standard error of cross-validation ratio were, for NDF, 0.91 and 3.37, and for ADF, 0.98 and 6.73, respectively, showing the high potential of NIRS to assess these components in chickpea for screening (NDF) or quality control (ADF) purposes. The spectral information provided by different chromophores existing in the chickpea seed highly correlated with the NDF and ADF composition of the seed, and, thus, those electronic transitions are highly influenced on model fitting for fiber.
Highlights
Accepted: 30 March 2021Among plants, the legume has long been known as a nutritious food, being suitable to complement cereals in human nutrition [1,2], and, in developing countries.Food legumes are a good source of dietary protein that can be used to replace more costly animal protein in human diets
The insoluble fraction of dietary fiber is most conveniently measured as a neutral detergent fiber (NDF) [7], and its determination accounts for the major components cellulose (β-1,4-linked glucose units), hemicellulose (β1,4-linked pyranosidic sugars), and lignin, or measured as acid detergent fiber (ADF), which is related to meal digestibility [8]
The aim of this work was to study the potential of near-infrared spectroscopy (NIRS) for assessing the NDF and ADF fractions of chickpea seed
Summary
The legume has long been known as a nutritious food, being suitable to complement cereals in human nutrition [1,2], and, in developing countries. Food legumes are a good source of dietary protein that can be used to replace more costly animal protein in human diets. Soluble fiber acts by lowering serum cholesterol, and prevents heart attack and colon cancer [6]. The insoluble fraction of the dietary fiber prevents constipation due to absorption of water from the digestive tract [9], and contributes to reduce the risk of other important diseases in humans, such as obesity, blood pressure, and appendicitis.
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