2018 Fiscal Year Final Research Report
Genetic basis for parallel evolution of selfing in green algae
| Project/Area Number |
17K15165
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Evolutionary biology
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| Research Institution | Chiba University |
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Principal Investigator |
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| Research Collaborator |
TSUCHIKANE Yuki
SEKIMOTO Hiroyuki
NISHIYAMA Tomoaki
KAWAGUCHI Yawako
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| Project Period (FY) |
2017-04-01 – 2019-03-31
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| Keywords | 自家交配 / 比較ゲノム |
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| Outline of Final Research Achievements |
In this study, we investigated the genomic consequences of evolutionary transitions between heterothallism and homothallism in Closterium peracerosum-strigosum-littorale complex, using the genome-wide polymorphism data from many wild samples. We revealed (1) recurrent transitions between mating types, (2) frequent segmental duplications particularly in homothallic strains, and (3) more accumulations of deleterious mutations in homothallic strains.
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| Free Research Field |
進化生物学
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| Academic Significance and Societal Importance of the Research Achievements |
自殖の進化は，何度も繰り返し起きた平行進化の好例である．繰り返し起きた自殖がどのような遺伝メカニズムにより生じ，ゲノムにどのような影響を与えるのかといった問題については，今まで被子植物における研究が主だった．本研究で，接合藻類ヒメミカヅキモにおける自殖進化の遺伝的背景を研究する基盤が整ったことで，自殖の平行進化をより広い分類群で解明し，適応進化にみられる普遍性を検討することができるようになると考えられる．
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