Genetic analysis of inflorescence branching traits in rose hybrid populations

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K15517
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Gifu University
• Principal Investigator: Ochiai Masaki 岐阜大学, 応用生物科学部, 助教 (80755827)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 花序形態 / 花房 / 房咲き性

Outline of Final Research Achievements

In order to explore the genes responsible for high inflorescence branching in rose cultivars, traits related to inflorescence branching and the number of alleles of the DNA marker that are expected to be associated with inflorescence branching were measured in rose hybrid populations and existing horticultural cultivars. The number of primary branches was determined as the most suitable index to evaluate the degree of inflorescence branching, and it was confirmed to be a quantitative genetic trait by analysis in the hybrid population. In addition, the quantification of the number of alleles of the focused DNA marker showed that there is a positive correlation between the number of primary branches and the number of alleles.

Free Research Field

園芸学

Academic Significance and Societal Importance of the Research Achievements

バラの花序の分枝性の評価に適した指標を絞り込めたこと、DNAマーカーのアレル数の定量化に成功したこと、加えて、研究対象としたバラの交雑集団がそれらの関係性を評価する材料として適していると判断できたことは、花序の高分枝性の原因遺伝子の探索に関わる今後の研究の躍進に強くつながる。また、本成果を基に研究をより発展させることで、バラでのマーカー育種への活用が期待される。