Genetic factors determining the flowering time of Chrysanthemum seticuspe

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K06024
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: SUMITOMO Katsuhiko 国立研究開発法人農業・食品産業技術総合研究機構, 野菜花き研究部門, 上級研究員 (70391406)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: キク / 開花 / QTL解析 / 高温開花性 / 到花日数 / 日長応答性

Outline of Final Research Achievements

Flowering time, heat torlerance of flowering, suboptimal long-day (13 hours daylenght) flowering, and reaction time were investigated and QTL analysis was conducted using the F2 population of Chrysanthemum seticuspe. Three QTL were detected in flowering time. The QTL of linkage group 2 (LG2) overlaped with the reaction time QTL. The QTL in LG4 overlaoed with QTL of reaction time and heat torlerance of flowering. The QTL of LG6 overlaped with the QTL for suboptimal long-day flowering. The fact that the genetic regions affecting the flowering time are composed of the genetic region of heat torlerance of flowering, suboptimal long-day flowering, and reaction time indicates that these factors are strongly involved in determining the flowering time.

Free Research Field

園芸学

Academic Significance and Societal Importance of the Research Achievements

キク属２倍体野生種キクタニギクの開花期を決定する要因を遺伝学的に明らかにし，原因遺伝子が座乗する領域を絞り込んだ．得られた知見は，我が国の切り花産業の基幹となるキク（栽培ギク）の開花生理を解明し，高精度な開花調節技術を開発するための基礎知見となる．