2018 Fiscal Year Final Research Report
Development of Axillary Bud Affected by Dominant-negative Mutant Allele in Tomato
Project/Area Number |
16K18648
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Horticultural science
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Research Institution | University of Tsukuba |
Principal Investigator |
WANG NING 筑波大学, 生命環境系, 助教 (90730193)
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Research Collaborator |
Yano Ryoichi
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Keywords | 脇芽 / トマト / ドミナントネガティブ / 摘芯 |
Outline of Final Research Achievements |
The axillary bud develops the axil of leaf and has the potential to form shoot or floral cluster. Pruning treatment can increase the size and quality of fruits in tomato cultivation, however, removing the growth point accompanies with derepressing axillary bud growth which require much workload to take care the branch formation. An axillary bud suppression mutant (abs1) was found from a comprehensive Micro-Tom EMS-mutant population. The abs1 produced either vegetative shoots (stems and leaves) or reproductive shoots (flowers) with no observable abnormalities in specification of floral organs. The phenotype of significantly repressed axillary bud in the abs1 mutant and F1 hybrid, implies that the abs1 has a dominant-negative mutant allele of casual gene. Repression of axillary bud is potentially utilized for facilitation of tomato cultivation, and a dominant-negative mutant allele can easily reveal its impact in hybrid breeding that improves working efficiency.
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Free Research Field |
園芸
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Academic Significance and Societal Importance of the Research Achievements |
ナス科には極めて多様な植物が含まれ、食用、薬用、鑑賞用などとして人類に多く利用される。中でも、トマトは世界的に最も重要な園芸作物の一つであり、果実発達研究のモデル植物として、また商業的な利用を目指した重要な研究対象でもある。品種育成と共に作型と整枝法について様々な工夫が行わ腋芽摘みや、摘心することによって果実は大きくなり、糖度も向上するため、品質および収量へ大きく影響する要因と言える。最も煩雑なのは腋芽摘出作業であり、その手間を省ける管理に適した品種の開発が期待される。腋芽成長を抑えることで労力軽減ができ、栽培効率を飛躍的に向上して生産性を高めることが可能となる。
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