| Budget Amount *help |
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2014: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| 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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