1994 Fiscal Year Final Research Report Summary
Molecular Analysis of Polyploid Speciation in Aster
| Project/Area Number |
06041016
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| Research Category |
Grant-in-Aid for international Scientific Research
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| Allocation Type | Single-year Grants |
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| Section | Field Research |
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| Research Institution | CHIBA UNIVERSITY |
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Principal Investigator |
ITO Motomoi Faculty of Science, Chiba University, 理学部, 助教授 (00193524)
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| Co-Investigator(Kenkyū-buntansha) |
朴 宰弘 大韓民国慶北大学, 生物学科, 助教授
SOEJIMA Akiko Faculty of General Science and Arts, Osaka Pref.University, 総合科学部, 助手 (00244674)
MORITA Tatsuyoshi Faculty of Education, Niigata University, 教育学部, 教授 (30115084)
PAK Iae-hong Department of Biology, Kyungpook National University
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| Project Period (FY) |
1994
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| Keywords | Aster ageratoides / Korea / phytogeography / polyploid complex / RFLP analysis / speciation |
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| Research Abstract |
Morphological, cytological and molecular analysis of Aster ageratoides complex in Korea had been studied. We collected about 500 plants from 35 population in Korea. In morphological study, two groups were recognized by leaf shape and stolon. One type has ovate leaves and stolon, and the other has lanceolate leaves and no stolon. The former distributes in south-east Korea and the distribution area is restricted, whereas the latter grows widely in Korea. These two types of plants do not occur in same area.
From the cytological analysis, all plants collected in Korea were diploid and it is quite difference the speciation pattern in Japan in which the plants make a polyploid complex. We had performed the RFLP analysis of cpDNA of the plants collected in Korea. As a result, no difference between two types had been detected in the present analysis, showing closely relatedness of two types. For comparing to the plants in Japan, we had reconstructed the phylogenetic tree of the result of present study and previous result of Japanese plants. The most parsimonious tree shows a topology which the Korean plants branched first, and then the Japanese plants are diverged. This result suggests that the Japanese plants of Aster ageratoides complex had been diverged in Japan.
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