Resistant Starch Content Is Related to Granule Size in Barley

• DOI: 10.1094/cchem-02-16-0025-r
• Publication Date: 2016-06-06T16:07:36Z
• Authors: Zaheer Ahmed; Ian J. Tetlow; Duane E. Falk; Qiang Liu; Michael J. Emes
• Keywords: Granule (geology)

Physical properties of resistant starch (RS) were examined in a range barley genotypes to determine the contribution and seed physical characteristics RS component. Thirty‐three studied, which varied significantly their RS, amylose, contents grain yield. From 33 genotypes, 13 exhibiting high selected for detailed physicochemical analysis starch. In high‐RS varieties, granule size number unimodal, compared with normal starches from reference genotype, showed bimodal distribution. Principal component (PCA) that higher content granules <15 µm was positively correlated amylose content, whereas proportion 15–45 negatively contents. fractionation by centrifugation into different population sizes demonstrated alone is not an accurate indicator A‐type B‐type within given genotype. PCA also large thickness thousand weight width. High‐RS high‐amylose variation overall yield some showing comparable Analysis amylopectin chain length distribution or associated long chains when either waxy (normal) genotypes. This study highlights useful markers screening favorable characteristics.