2021 Fiscal Year Final Research Report
Relationship between inheritance of non-dormancy traits of flower buds and SVP gene in the cross of (Rhododendron oldhamii x R.kiusianum) x R. kiusianum.
| Project/Area Number |
19K06036
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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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| Review Section |
Basic Section 39030:Horticultural science-related
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | ツツジ / 花芽非休眠性 / SVP |
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| Outline of Final Research Achievements |
To clarify the relationship between the non-dormancy of flower bud in Rhododendron oldhamii and the SVP gene, flowering habit and the inheritance of SVP gene were investigated using BC1 seedlings from (R. oldhamii × R. kuisianum #1 )×R.kiusianum #2). In the F1 seedlings, the first flowering date was early in all the individuals, suggesting that the non-dormancy habit from R. oldhamii is dominant. In the BC1 seedlings, the first flowering day varied widely, suggesting that they were separated into non-dormant and dormant types. When the inheritance of the SVP gene in BC1 was investigated using the PCR-RFLP method, the first flowering date of the BC1 population with the SVP derived from R. oldhamii was early. From these results, the relationship between the inheritance of the SVP gene and the dormancy of flower buds was suggested.
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| Free Research Field |
花卉園芸学
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| Academic Significance and Societal Importance of the Research Achievements |
ツツジの花芽における休眠性の要因を遺伝子レベルで明らかにし，休眠性の交配後代への遺伝と関連する遺伝子を明らかにすることで，育種を効率的に行う際に必要な，低休眠性系統を選抜できるマーカーの開発が可能になり，沖縄など冬季の低温量が少ない亜熱帯地域に適応したツツジ品種の効率的な作出が可能になる．
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