| Project/Area Number |
25291091
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | National Museum of Nature and Science, Tokyo |
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Principal Investigator |
KATO Masahiro 独立行政法人国立科学博物館, その他部局等, 名誉研究員 (20093221)
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| Co-Investigator(Kenkyū-buntansha) |
KATAYAMA Natsu 日本女子大学, 理学部, 研究員 (20723638)
NISHIYAMA Tomoaki 金沢大学, 学内共同利用施設等, 助教 (50390688)
KOI Satoshi 大阪市立大学, 大学院理学研究科, 講師 (60470019)
YAMADA Toshihiro 金沢大学, 大学院自然システム系, 准教授 (70392537)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Keywords | 進化 / 形態多様性 / 適応進化 / 中立進化 / 遺伝子 |
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| Outline of Final Research Achievements |
An evolutionary biological theory claims that the evolution of morphology is neutral under no or little pressure of selection. It may be possible that neutral evolution of morphology is involved in the diversification of the aquatic flowering plant family Podostemaceae living in extreme habitats with no or few competitors. In comprehensive analyses of genes, we found high synonymous substitution rates or mutation rates, and also numerous nonsynonymous substitutions.It may be likely therefore that Podostemaceae evolved in a condition of relaxed negative selection. We also found four monocotyledonous species in Hydrobryum, and the evolution of monocotyly is recurrent. In a monocotyledonous species, unusual cell divisions take place in an early stage of embryogenesis.
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