2013 Fiscal Year Final Research Report
DNA analysis for choromosome size changing in plant
| Project/Area Number |
23570122
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Tokai University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
SOEJIMA Akiko 熊本大学, 大学院自然科学研究科, 教授 (00244674)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 種分化 / 染色体 |
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| Research Abstract |
Angiosperms show unusually wide range of genomes size with nearly 2,000-fold. The largest DNA amount measured is found in Fritillaria species (Liliaceae) with about 130 pg (130,000 Mbp) in the genome, possessing gigantic chromosomes with 10 to 20 µm. In contrast, the smallest genome is recently found in two carnivorous plant species of Genlisea (Lentibulariaceae) with just 0.06 pg (63 Mbp). The plant groups with wide genome ranges are restricted to some large families such as Asteraceae, Fabaceae, Liliaceae, Orchidaceae and Poaceae. Whereas sundew carnivorous plant group, the Droseraceae and its closely related family Drosophyllaceae, show unexpectedly high genome size variation with tiny to giant chromosomes. New insight was obtained after analyzing large (L-type) and small (S-type) chromosome sets in the genome composition in Aster (Asteraceae) and Drosera (Droseraceae).
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