Grain Size and Shattering Habit of Unhulled Rice in the Rice Seed Aggregate Excavated from the Remains in the Yayoi Reriod

• Minabe Naofumi

  Graduate School of Agriculture, Kyoto University

• Sumikawa Akinori

  Graduate School of Agriculture, Kyoto University

• Tojo Daiki

  Graduate School of Agriculture, Kyoto University

• Kinuhata Ayumu

  Archaeological Institute of Kashihara, Nara prefecture

• Okada Kenichi

  Archaeological Institute of Kashihara, Nara prefecture

• Fujita Saburou

  Tawaramoto Town Board of Education, Nara

• Niwa Keizi

  Sakurai City Board of Education, Nara

• Inamura Tatsuya

  Graduate School of Agriculture, Kyoto University

Bibliographic Information

Other Title

• 弥生時代の出土米ブロックに含まれる籾の粒形と脱粒性について
• 弥生時代の出土米ブロックに含まれる籾の粒形と脱粒性について : 唐古・鍵遺跡と大福遺跡の事例から
• 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 リュウケイ ト ダツリュウセイ ニ ツイテ : トウ コ ・ カギ イセキ ト ダイフク イセキ ノ ジレイ カラ
• Case of Karako-Kagi Remains and Daifuku Remains
• 唐古・鍵遺跡と大福遺跡の事例から

Abstract

The X-ray CT measuring was carried out at SPring-8 under measurement conditions of a pixel size of 25.4μm for the rice seed aggregates excavated from the Karako-Kagi remains and Daifuku remains in the Yayoi period. By analysis of the X-ray CT images of aggregate, it was suggested that all the unhulled rice in the aggregates were classified into Japonica type from the grain shape (length-to-width ratio) and the grain size of unhulled rice in the aggregates were significantly different between the remains. Based on the histogram of the length of unhulled rice, it was suggested that rice grains in each block might originate from single rice variety or rice strain having different grain size between each block. The shattering proportion of unhulled rice in the aggregate of both remains was equivalent to the hard shattering habit of the current cultivar, but the shattering part of unhulled rice was the abscission layer at the base of rachilla. This shattering part is same as the part of the current cultivar with the easy shattering habit. On the other hand, analysis of the thickness of brown rice indicated that the non-shattering unhulled rice may have been harvested before maturing. Based on these findings, it was considered that comprehensive evaluation of the shattering proportion, the shattering part of unhulled rice and the grain filling level was required for the evaluating shattering habit of the unhulled rice in the aggregate excavated.

Journal

• Journal of Crop Research

  Journal of Crop Research 64 (0), 37-42, 2019

  The Society of Crop Science and Breeding in Kinki, Japan

Keywords

• Excavated rice block
• X-ray CT measuring
• Unhulled rice
• Shattering habit

Details

• CRID: 1390282752324100608
• NII Article ID: 130007703945
• NII Book ID: AA12344964
• DOI: 10.18964/jcr.64.0_37
• ISSN: 24241318
• ISSN: 1882885X
• NDL BIB ID: 030095669
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I030095669
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed