1999 Fiscal Year Final Research Report Summary
Molecular Phylogeny and Evolution of Helenioid Asteraceae
| Project/Area Number |
10041171
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
系統・分類
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
YAHARA Testukazu Kyushu University, Graduate School of Science, Professor, 大学院・理学研究科, 教授 (90158048)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAHARA Takayuki The Ministry of Agriculture Forestry and Fisheries, Forestry and Forest Products Research Institute, Hokkaido Research Center, Genetics Laboratory, Chief, 森林総合研究所・北海道支所遺伝研究室, 研究室長 (90221902)
MISHIMA Misako Japan Society for the promotion of Science, Research Fellow, 特別研究員
WATANABE Kuniaki Kobe University, Faculty of Science, Professor, 理学部, 教授 (80031376)
SOEJIMA Akiko Osaka Prefecture University, College of Integrated Arts and Sciences, Research Associate, 総合科学部, 助手 (00244674)
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| Project Period (FY) |
1998 – 1999
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| Keywords | Asteraceae / Molecular phylogeny / Polyploidy / Diploidization / Mexico |
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| Research Abstract |
Heliantheae and Eupatorieae comprise approximately 1/4 of the total species and 1/3 of the total genera of Asteraceae. Our previous studies showed that these two tribes are sister to each other and are derived from any lineage of Helenieae, a paraphyletic group. This project was organized in order to get materials to test our hypothesis that a large monophyletic group comprising Helenieae, Heliantheae, and Eupatorieae was diverged after a single polyploidization.
In 1998, we carried out field expeditions in northeastern states of Mexico such as Nuevo Leon, Tamaulipas, and Coahuila. As a results, we collected samples for molecular phylogenetic studies and chromosome number surveys as well as voucher specimens of these samples. In 1999, we made additional field expeditions in northeastern states of Mexico, and also had another expedition in Ozark mountain in the Missouri-Arkansas state border in USA and collected materials of Marshallia that is a candidate outgroup of the Helenieae-Heliantheae-Eupatorieae clade.
Molecular phylogenetic analysis using sequence information of rDNA-ETS supported our hypothesis, but the support was not definitive. Further molecular studies using additional genes are now on going.
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