Morphology of the unhulled rice contained in the rice seed aggregate of the Yayoi period excavated from the remains in Nara, Tottori, and Tokyo

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  • 奈良県，鳥取県，東京都の遺跡から検出された弥生時代の出土米ブロックに含まれる籾の形状
  • ナラケン,トットリケン,トウキョウト ノ イセキ カラ ケンシュツ サレタ ヤヨイ ジダイ ノ シュツド ベイ ブロック ニ フクマレル モミ ノ ケイジョウ

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Abstract

The X-ray CT measuring was carried out in SPring-8 for the judgment of the morphology of the unhulled rice contained in the 12 rice seed aggregates of the early, middle and latter of Yayoi period excavated from the five remains in Nara Prefecture, Tottori Prefecture, and Tokyo. From the analysis of the X-rays CT image, the 12 rice seed aggregates excavated included the spikelet and part of panicle, and the unhulled rice in the 12 aggregates were classified into the temperate japonica type. In many cases, the grain shape of unhulled rice in the aggregates differed among 12 aggregates. The length and width of unhulled rice in the 12 aggregates showed the normal distribution with small variation width as those of modern cultivar. Based on the above-mentioned results, the unhulled rice in each aggregates might originate from single rice variety of the temperate japonica type having different grain shape. The width of unhulled rice in the aggregates of Aoyakamijichi remain were bigger, and these aggregates were classified into the smaller type of length/width ratio as compared with other aggregates.

Journal

  • Journal of Crop Research

    Journal of Crop Research 66 (0), 13-19, 2021

    The Society of Crop Science and Breeding in Kinki, Japan

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