Abstract
ABSTRACTThe existence of a population of small (B‐type) starch granules (<10 μm diameter) in addition to the major (A‐type) granules presents a problem for starch‐gluten manufacture and certain other wheat processes. A survey of starches in 761 accessions of cultivated wheats, ryes, and wild relatives was conducted. Starch was extracted from grains and analyzed for particle‐size distribution by laser diffraction. Australian hexaploid wheat cultivars showed 23–50% of starch in B granules. Landraces from Asia extended this range down to 17%. Tetraploid wheats (Triticum turgidum) showed a similar range of 17–47%, and einkorn wheat (T. monococcum) ranges were 23–62%. The range for B‐granule content in rye was only 20–40%, while that in triticale and T. tauschii went down to 15%. The results show that there are clear prospects for manipulating the starch particle‐size distribution of cultivated wheats.
Published Version
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