2016 Fiscal Year Final Research Report
Evolutionary function of F1 pollen sterility on AA genome divergence on genus Oryza
| Project/Area Number |
24248002
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Breeding science
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
YOSHIYUKI Yamagata 九州大学, 農学研究院, 学術研究員 (00600446)
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| Project Period (FY) |
2012-10-31 – 2017-03-31
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| Keywords | 生殖的隔離 / 雑種不稔 / イネ / 種分化 / AAゲノム種 |
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| Outline of Final Research Achievements |
Molecular genetic mechanism of F1 pollen sterility in hybrids among AA genome species of genus Oryza, especially between Oryza sativa and O. glumaepatula, were elucidated in this study. By map-based cloning approach, we revealed that S22A and S22B are the members of multigene family carrying domain unknown function, which is specifically found in Poaceae, and phylogeographical origin of causal mutation of S22B in O. barthii and O. glumaepatula gene pools. We also revealed that gene duplication and loss-of-fucntion of RNA polymerase III gene caused F1 pollen sterility in O. sativa and O. nivara hybrids, suggesting that an essential gene for life cycle like house-keeping gene is possible to be a cause of reproductive isolation.
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| Free Research Field |
植物育種学
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