2023 Fiscal Year Final Research Report
Identification of genes responsible for agronomic traits under reproductive stage in spinach, by using a high quality genome sequence.
| Project/Area Number |
21K05525
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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 39010:Science in plant genetics and breeding-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | ホウレンソウ |
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| Outline of Final Research Achievements |
In this study, we developed a chromosome-scale reference genome to identify genes related to reproductive traits in spinach efficiently. By using cross progeny populations of female and highly male monoecious plants, we mapped three QTLs associated with the control of femaleness (monoecious expression) on the reference genome. Additionally, it was suggested that qFem2.1 and qFem6.1 function as modifying genes for the major monoecious gene (qFem3.1). Furthermore, we found that FT homologs located in the two QTLs for bolting promote flowering, based on the analysis of transgenic Arabidopsis with over-expression of the FT homologs.
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| Free Research Field |
植物育種
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| Academic Significance and Societal Importance of the Research Achievements |
ホウレンソウは雌雄異株として知られるが，実際には雌花および雄花を様々な比率（雌性率）で着生する間性株（雌雄異花同株）が存在する．特に，間性株の雌性率はF1採種の受粉制御に関わる重要形質であり，雌性率の制御機構の解明が重要課題になっている．ホウレンソウの花成・抽苔は長日によって促進され，抽苔性は栽培地域および作型の適性を支配する重要形質の一つである．本研究では、これらの形質の発現に関わる遺伝的機構を明らかにし，当該形質を支配する遺伝子の有力な候補を同定した．本研究成果は，ホウレンソウ育種の効率化への貢献が期待できる．
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