A simply rapid identification of wheat kernel hardness using a hand-operated grinder known as Grain Crusher was examined. When 2g of grains from nonwaxy and waxy varieties of wheat having different kernel hardnesses were crushed with the hand-operated grinder, there were clear differences in the size and the cross section color of the fragments of crushed grains. In the soft grains, there were many large fragments with white cross sections. On the other hand, there were many medium-size fragments with amber (light brown) cross sections in the hard grains. Moreover, fragments of various sizes were mixed in the grains segregated kernel hardness, and the cross sections of the fragments were mixed white and amber. The judgment value of kernel hardness (JVKH) of the same cultivar and line were extremely consistent throughout the different production sites and crop years. In the breeding lines of nonwaxy wheat, the percent of fitness between the JVKH and the kernel hardness judgment value classified by the flour specific surface area was 87.5～100%. When the kernel hardness judgment standard of the specific surface area was the same in both nonwaxy wheats and waxy wheats, the percent of fitness in waxy wheats was 38.9～100%, and the differences among the materials were large. On the other hand, the percent of fitness was improved to 71.3～100% when the kernel hardness judgment standard by the specific surface area in waxy wheats was changed.
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小麦育種における手動粉砕機を用いた原粒硬軟質性の簡易判定法
tarc_report_No112p85-100p.pdf
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