低氧是水产养殖动物面临的主要胁迫之一。鳙(Hypophthalmichthys nobilis)是我国最重要的淡水养殖鱼类之一,其对低氧胁迫敏感,但相关的遗传基础研究报道很少。本研究利用cDNA-扩增片段长度多态性(cDNA-amplified fragment length polymorphism,cDNA-AFLP)技术对低氧敏感和低氧耐受两组鱼进行比较分析,鉴定鳙与低氧反应相关的信号通路中的差异表达基因。从Eco RⅠ和MseⅠAFLP体系的256个引物组合共获得10 571条转录衍生片段(transcript-derived fragments,TDFs)。其中,低氧胁迫后差异表达的TDFs数目为221个,包括上调表达137个(62%),下调表达84个(38%)。对70个差异TDFs成功地进行了切胶回收、PCR产物克隆和测序,序列比对分析后发现:29个TDFs在数据库中未检索到同源序列;9个TDFs比对到未知功能序列;32个TDFs比对到已知生物学功能的序列,其功能包括转录调控、应激和信号转导、能量代谢、蛋白质合成、免疫防御以及细胞生长与增殖。随机选取4个已知功能的TDFs(ANXA6、TRIM25...
【英文摘要】
Hypoxia is one of the major stresses in aquaculture animals. Bighead carp(Hypophthalmichthys nobilis) is one of the most important aquaculture fish in China, which is sensitive to hypoxia stress, and the related genetic research is rarely reported. In this study, six hypoxia-sensitive samples(S group) and six hoypoxia-tolerant samples(T group) from a hypoxia stress experiment of bighead carp were selected, and differentially expressed genes between the two groups were analyzed using cDNA-amplified fragment ...