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《Journal of Fudan University(Natural Science)》 2011-05
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Histological Analysis and Aromatase Gene Expression in Sex Differentiation in Takifugu obscures

LI Yan-shen1,DAI Qi1,GUO Zheng-long2,ZHU Yong-xiang2,HUANG Bo1,ZHOU Zhong-liang1(1.School of Life Science,East China Normal University,Shanghai 200062,China; 2.Jang Su Zhong Run Agricultural Development Co.,Ltd.,Nantong 226634,China)  
The process of gonadal differentiation and Aromatase gene CYP19A expression in Takifugu obscures was studied by histological analysis and quantitative real-time PCR(qRT-PCR).The results of histological analysis showed: primordial germ cells(PGC) was observed at 11 dah(day after hatching),and gonad anlage(GA) occurred at 17 dah;Primitive gonad(PG) freed from the coelarium was observed at 26 dah.Ovarian differentiation occurred earlier than testicular.The original ovarian cavity(Oc) appeared in some individuals at 35 dah,but primitive sperm lobule and sperm duct did not appear until 47 dah.At 80 dah,original ovarian lobules(Ol) has appeared and testicular lobules gradually increased,but the cytological differentiation did not occur.Sexually dimorphic gene expression of CYP19A was observed.Expression of CYP19A mRNA was increased significantly at 16 dah in female,and slightly up-regulated in male at 66 dah.The results support that estrogen is important in ovarian differentiation and proliferation of primary spermatogonia.
【CateGory Index】: S917.4
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