Molecular mechanism and application of the andromonoecy in garden asparagus

2020 Fiscal Year Final Research Report

• Project/Area Number: 18H02192
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 39030:Horticultural science-related
• Research Institution: Tohoku University
• Principal Investigator: Kanno Akira 東北大学, 生命科学研究科, 准教授 (10260449)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: アスパラガス / 間性 / SOFF遺伝子

Outline of Final Research Achievements

Andromonoecious is an important agricultural characteristic for asparagus breeding. For producing all-male hybrid seeds, we need super-male line which can be obtained by self-crossing of an andromonoecious line. To clarify the the molecular mechanism of the transformation from male to andromonoecious line, we analyzed the structure and expression of the SOFF gene, which is a male repressor gene. However, there are no remarkable difference between wild type male and andromonoecious line. We crossed Asparagus officinalis (andromonoecious line) and A. kiusianus and succeeded to get the andromonoecious interspecific hybrid, indicating that this character was inheritable in these species.

Free Research Field

分子育種学

Academic Significance and Societal Importance of the Research Achievements

アスパラガスの間性は雄株における雌蕊の発達が抑制されない現象であることから，SOFF遺伝子そのものに変異があることが予想されたが，結果は否だった．SOFF遺伝子がアスパラガスの雌蕊の発達抑制にどのように関与しているかは明らかになっておらず，間性の分子機構を明らかにすることで，アスパラガスの性分化機構における新しい制御因子の存在が明らかになる可能性が示された．