Genomic analysis into the evolution of selfing in a wild Arabidopsis species

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K06835
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 45040:Ecology and environment-related
• Research Institution: Fasmac Co., Ltd. (2021); The University of Tokyo (2019-2020)
• Principal Investigator: Kubota Shosei 株式会社ファスマック, バイオ研究支援事業部, 研究員(移行) (10771701)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 次世代シーケンサー / 自殖 / ハクサンハタザオ / 自家不和合性 / S遺伝子

Outline of Final Research Achievements

Arabidopsis halleri is a wild perennial herb closely related to A. thaliana. The plant has long been considered as a self-incompatible, fully outcrossing species. Here, self-compatible selfing populations were identified from crossing experiments. However, genome-wide population genomics has pointed out that selfed seeds do not contribute to population reproduction, probably because of strong inbreeding depression. Furthermore, genome-wide resequencing dataset was used to investigate the genetic mutation underlying the breakdown of self-incompatibility.

Free Research Field

ゲノム生態学

Academic Significance and Societal Importance of the Research Achievements

他殖と自殖の進化を扱う研究は、ダーウィンをはじめとして古くから数多くの研究が実施されてきた。本研究は他殖から自殖への進化という、被子植物において一般的な進化傾向のメカニズムとプロセスの包括的理解を目指す研究である。自殖性は育種や農業にも重要な形質であるため、その包括的理解は進化研究の発展のみならず、食料生産分野における新規有用形質の創出や、生産性向上にも貢献することが期待される。