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2003 Fiscal Year Final Research Report Summary

Studies on Fitness and Mechanism of Multiple-herbicide Resistant Echinochloa oryzicola Vasing

Research Project

Project/Area Number 14560038
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 植物保護
Research InstitutionKyoto University

Principal Investigator

YAMASUE Yuji  Kyoto University, Graduate School of Agriculture, Associate Professor, 農学研究科, 助教授 (60093332)

Co-Investigator(Kenkyū-buntansha) NAKAZAKI Tetsuya  Kyoto University, Graduate School of Agriculture, Instructor, 農学研究科, 助手 (60217693)
OKUMOTO Yutaka  Kyoto University, Graduate School of Agriculture, Associate Professor, 農学研究科, 助教授 (90152438)
Project Period (FY) 2002 – 2003
KeywordsHerbicide resistance / Tainu-bie / Echinochica oryzicola / Echinochica phyllopogon / Echinochica weeds / P-450
Research Abstract

In 1997, a multiple-herbicide resistant biotype of E.oryzicola, was found at the rice paddy area of Sacramento in California. This resistant biotype was studied with objectives to elucidate (1) its relative fitness against susceptible biotype and (2) mechanism of the resistance.
1.Relative fitness of the resistant biotype
The number of seeds produced by a plant was measured as a criterion of fitness on individuals grown in a transplanted field experiment in Kyoto and on those grown at various fields of Sacramento. The relative fitness of resistant biotype ranged from 0.70 to 0.73 in the transplanted experiment of Kyoto and from 0.50 to 0.58 in the actual field survey at Sacramento.
2.Mechanism of the resistance
Mechanism of the resistant biotype to several herbicides that differ in chemical structure and mode of action was studied with an attention to the microsomal P-450. In biochemical and molecular analyses of this project, it was found that the resistant biotype induced larger P-450 activity than the susceptible biotype when treated with a herbicide, and that more than a species of P-450s were involved in the herbicide resistance.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Tsuji, R.A.J.Fischer, A.Roel, M.Yoshino, J.E.Hill, Y.Yamasue: "Herbicide-resistant late watergrass (Echinochloa phyllopogon):similarity in morphological and amplified fragment length polymorphism traits"Weed Science. 51. 740-747 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 町田隆幸, A.J.Fischer, 山末祐二: "タイヌビエの多除草剤抵抗性型と感受性型バイオタイプの生育と種子生産"雑草研究. 48(別号). 42-43 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tominaga, T., Y.Yamasue: "Crop-associating weeds, in "Weed Ecology and Management""Kluwer Acad.Pub., Netherlands. 553 (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsuji, R., A.J.Fischer, A.Roel, M.Yoshino, J.E.Hill, Y.Yamasue: "Herbicide-resistant late watergrass (Echinochloa phyllopogon) similarity in morphological and amplified fragment length polymorphism traits"Weed Science. 51. 740-747 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Machida, T., A.J.Fischer, Y.Yamasue: "Growth and seed production of multiple-herbicide resistant biotype of Echinochloa oryzicola Vasing."Weed Research, Japan. 48(Suppl.). 42-43 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tominaga, T., Y.Yamasue: "Crop-associating weeds"Weed Ecology and Management(Kluwer Acad.Pub., Netherlands). 47-63 (2004)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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