2017 Fiscal Year Final Research Report
Studies on sex-chromosome turnover and evolution of secondary sexual characteristics in the family Adrianichthyidae
Project/Area Number |
26291093
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Ecology/Environment
|
Research Institution | University of the Ryukyus |
Principal Investigator |
|
Co-Investigator(Kenkyū-buntansha) |
北野 潤 国立遺伝学研究所, 集団遺伝研究系, 教授 (80346105)
|
Project Period (FY) |
2014-04-01 – 2018-03-31
|
Keywords | 進化 / 生態 / 性淘汰 / スラウェシ |
Outline of Final Research Achievements |
In this study, we tested the possibility that sex-chromosome turnover led to rapid evolution of secondary sexual characteristics in medaka fishes in Sulawesi Island. Analyses of population structures and sex-determination systems using sex-linked markers revealed that the Malili medaka species complex diverged into six populations while being mixed with each other by a certain degree of gene flows, and that sex-determination systems are polytypic with sex-chromosome turnovers among the species/populations. QTL mapping using an inter-specific cross line revealed that male-specific fin reddishness of the Muna medaka species complex is regulated by an autosomal gene, but that multiple loci may be involved in male-specific body blueness.
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Free Research Field |
進化生態学
|