| Project/Area Number |
10836016
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
自然史科学
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| Research Institution | OSAKA PREFECTURE UNIVERSITY |
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Principal Investigator |
YAMAGUCHI Hirofumi GRADUATE SCHOOL OF AGRICULTURE AND BIOLOGICAL SCIENCES, OSAKA PREFECTURE UNIVERSITY, PROFESSOR, 農学生命科学研究科, 教授 (20112542)
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| Co-Investigator(Kenkyū-buntansha) |
NISHINO Akako COLLEGE OF INTEGRATED ARTS AND NATURAL SCIENCES, OSAKA PREFECTURE UNIVERSITY RESEARCH ASSOCIATE, 総合科学部, 助手 (20264822)
SOEJIMA Akiko COLLEGE OF INTEGRATED ARTS AND NATURAL SCIENCES, OSAKA PREFECTURE UNIVERSITY RESEARCH ASSOCIATE, 総合科学部, 助手 (00244674)
MOCHIOKA Ryosuke COLLEGE OF AGRICULTURE, OSAKA PREFECTURE UNIVERSITY LECTURER (20221624)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | genus Echinochloa / adaptation / genetic diversity / domestication |
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| Research Abstract |
Genetic and morphological diversity was analyzed on the Echinochloa materials mainly collected from Yungui Highlands in China including species from global area in order to understand the process of adaptation such as domestication to crops and mimic weeds to specialists in cultivated fields. Isozymic and RAPD analyses indicated clearly the identity of biological species (E.crus-galli-E.esculenta complex, E.oryzicola complex, E.colonum-E.frumentacea complex), which was supported by the sequencing of non-coding region of trnT-L-F genes on cpDNA.Herbarium study, morphological evaluation at experimental farm and DNA analyses on a lot of accessions revealed the distance-dependent diversification of DNA variation (both in sequence and RAPDs), the wider distribution of domesticated traits as E.esculenta in E.crus-galli complex and the narrow distribution of domesticated traits as cultivated E.oryzicola. Specialization as weeds was found as mimic features and non-shattering habit of diaspore, which evolved as parallel in E.crus-galli complex and E.oryzicola complex. Seedling stage mimic was found in both species. Panicle mimic and auricle-like hairs on the collar of leaf sheath was particularly in E.oryzicola, which was conventionally treated as E.persistentia taxonomically. Non-shattering of diaspore was found in both complexes in the paddy fields, rainfed and irrigated paddies, and upland fields. Since this analyses also provide recognition of biological species and infraspecific taxa, and information on molecular identification technique. Further investigation on type specimen will provide delimitation of correct nomenclature name and others, which will solve the taxonomic confusion of this genus Echinochloa. The final report of this project includes 16 figures, 5 tables, 8 plates and text.
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