| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
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| Outline of Final Research Achievements |
This study developed DNA makers which enable to select genetic male Nile tilapia. Using DNA maker, YY females were produced, resulting establishment of a method to produce all YY population. This method enable stable production of all male population as industrial useful level. In the tilapia ovarian differentiation, roles of fsh signal seemed limited and linear signaling through foxl2, cyp19a1a and estrogen production seemed sufficient signal for triggering ovarian differentiation. In the testicular differentiation, gsdf was not suggested to locate below dmrt1 signal. The fact that gsdf seemed not to affect estrogen production pathway may suggest tilapia sex differentiating factor have a role to inhibit estrogen synthesis pathway, which resulted in gsdf and dmrt1 expression that lead to trigger the testicular differentiation.
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