Hybridization and speciation of Acropora - Elucidation from fertility of hybrids and multi specific synchronous spawning -

2016 Fiscal Year Final Research Report

• Project/Area Number: 26440225
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Biodiversity/Systematics
• Research Institution: Okinawa National College of Technology
• Principal Investigator: Isomura Naoko 沖縄工業高等専門学校, 生物資源工学科, 准教授 (90376989)
• Research Collaborator: Iwao Kenji 阿嘉島臨海研究所, 研究員
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 雑種体の妊性 / 雑種第二代 / 多種同調産卵 / 自家受精

Outline of Final Research Achievements

We elucidated hybridization and speciation of Acropora using Acropora intermedia and A. florida. Colonies with morphologies intermediate (suspected hybrids) between two target species were found in the fields where multi specific synchronous spawning occurred. These three species, A. interemedia, A. florida and suspected hybrids, may perform introgression each other because common haplotypes were found among them. Real F1 hybrids which were produced artificially were fertile, and they could cross both other hybrid and parent species. Furthermore, more than 90% self-fertilization was achieved in a real F1 hybrid. These results suggest that some products of interspecific hybridization may persist as the offspring of self-fertilizing F1 hybrids in the field where multi specific synchronous spawning occurs.

Free Research Field

分子繁殖生態学