2011 Fiscal Year Final Research Report
Does apomixis occur to cause genomic duplication and clonal reproduction in sturgeons?
| Project/Area Number |
21658067
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
General fisheries
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| Research Institution | Hokkaido University |
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Principal Investigator |
ARAI Katsutoshi 北海道大学, 大学院・水産科学研究院, 教授 (00137902)
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| Co-Investigator(Kenkyū-buntansha) |
ADACHI Shinji 北海道大学, 大学院・水産科学研究院, 教授 (40231930)
YAMAHA Eturo 北海道大学, 北方生物圏フィールド科学センター, 教授 (60191376)
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| Project Period (FY) |
2009 – 2011
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| Keywords | ゲノムサイズ / 倍数体 / 生殖細胞 / 染色体 / FISH / 雑種 / 希少種 / 凍結保存 |
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| Research Abstract |
Possible involvement of "apomixis", which causes clonal reproduction and polyploidy in plants, was investigated in sturgeon species. Genome size estimation by DNA content flow cytometry and molecular cytogenetic analyses including FISH clearly showed elevation and reduction of ploidy status among different species as well as occurrence of genetic diploid and tetraploid in artificially propagated con-specific and hybrid progeny. The results suggest ploidy variation should happen in present sturgeon species.
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