2014 Fiscal Year Final Research Report
Clarification of fading of yellow flower coloured petals of the progeny from the wide cross between evergreen and yellow flowered deciduous azaleas.
| Project/Area Number |
24580047
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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 |
Horticulture/Landscape architecture
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | CCD4 / カロテノイド / ツツジ / 黄色花 |
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| Outline of Final Research Achievements |
Carotenoid contentand the expression patterns of carotenoid biosynthesis genes during petal development were compared among a yellow-flowered deciduous azalea (Rhododendron japonicum f. flavum), a white-flowered evergreen azalea (‘Miyamasatsuki’), and their progeny, to determine the factors that cause reduction in carotenoid content as the petals develop of their progeny. The expression levels of PSY and PDS became significantly higher in R. japonicum f. flavum than in ‘Miyamasatsuki’ as the flowers developed. Their expressions in the progeny were mid-way between both parents. The expression level of CCD4 was significantly higher in ‘Miyamasatsuki’ and the progeny than in R. japonicum f. flavum for all development stages. This result suggested that the high expression level of CCD4, which was inherited from ‘Miyamasatsuki’, was the main factor controlling the reduction in carotenoid content in the progeny.
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| Free Research Field |
花卉園芸学
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