Screen for stage-specific expression genes between tail bud stage and heartbeat beginning stage in embryogenesis of gyno
A systemic study was initiated to identify stage-specific expression genes in fish embryogenesis by using suppression subtractive hybridization (SSH) technique. In this study, we presented a preliminary result on screen for stage-specific expression genes between tail bud stage (TBS) and heartbeat beginning stage (HBS) in gynogenetic silver crucian carp (Carassius auratus gibelio). Two SSH plasmid libraries specific for TBS embryos and HBS embryos were constructed, and stage-specific expression genes were screened between the two stages. 1963 TBS positive clones and 2466 HBS positive clones were sampled to PCR amplification, and 1373 TBS and 1809 HBS PCR positive clones were selected to carry out dot blots. 169TBS dot blot positive clones and 272 HBS dot blot positive clones were sequenced. Searching GenBank by using these nucleotide sequences indicated that most of the TBS dot blot positive clones could not be found homologous sequences in the database, while known genes were mainly detected from HBS dot blot positive clones. Of the 79 known genes, 20 were enzymes or kinases involved in important metabolism of embryonic development. Moreover, specific expressions of partial genes were further confirmed by virtual northern blots. This study is the first step for making a large attempt to study temporal and spatial control f gene expression in the gynogenetic fish embryogenesis.
作 者： YAO HUA SHI JUN LIU JIAN HONG XIA JIAN FANG GUI 作者单位： State Key laboratory of Freshwater Ecology and Biotechnology, Wuhan Center for Developmental Biology,Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China 刊 名： 细胞研究(英文版) ISTIC SCI 英文刊名： CELL RESEARCH 年，卷(期)： 2002 12(2) 分类号： Q2 关键词： SSH embryonic development differential expression genes gynogenesis silver crucian carp