Screen of differentially expressed genes between Gastrula embryos and tail budembryos in gynogenetic gibel carp (Carassius auratus gibello)

Suppression subtractive hybridization (SSH) cDNA plasmid libraries were constructed between gastrula embryos and tail bud embryos in gynogenetic gibel carp ( Carassius auratus gibelio). 739 and 816 PCR positive clones were respectively selected to perform dot blot, and 72 dot blot positive clones and 98 dot blot positive clones were obtained from the SSH plasmid libraries specific for gastrula embryos and tail bud embryos. Sequencing analysis and database searches indicated that there were 19 known genes and 31 unknown cDNA fragments in the sequenced 72 dot blot positive clones specific for gastrula embryos,And 52 known genes and 37 unknown cDNA fragments in the sequenced 98 dot blot positive clones specific for tail bud embryos. Moreover,specific expressions of partial genes were further confirmed by virtual Northern blots and RT-PCR. The screen of these differentially expressed genes will help us to understand the molecular mechanism in gibel carp embryogenesis