| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Research Abstract |
Sexual plasticity of fish gonad was addressed by morphologial and molecular biological approaches. In mauring ovary of common carp, special regions retain a potential to be differentiated into testicular tissue. Gonadal soma derived growth factor(GSDF) is expressed in the regions, suggesting its involvement in the sexual plasticity. This growth factor is shown to exert a crucial role in the protogynous sex change(from ovary to testis) in wrasse. Meanwhile, estrogen administration to genetic male of common carp showed that sexual plasticity regressed as testicular tissue architecture was formed.
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