【摘要】 <正>大菱鲆隶属于鲆科(Bothidae)、菱鲆属(Scophthalmus), 自然分布于大西洋东侧欧洲沿岸以及黑海和地中海沿岸, 是欧洲的重要养殖鱼类之一,1992年黄海水产研究所自英国引进这一鱼种,目前已在我国山东、辽宁、福建等沿海地区推广养殖,成为我国工厂化海水养殖的名贵鱼种之一。对于这一引进的新鱼种,在其胚胎和仔稚幼鱼的发育,体表色素细胞形态,卵膜对DMSO的渗透性等生物学方面进行了一定的研究,而做为一个新的鱼种资源,对其种质资源的保存研究,目前国内还未有报道。冷冻保存是长期保存鱼类种质资源和遗传多样性的有效手段,但鱼类胚胎由于体积大(直径为1-6 mm),膜通透更多还原

【Abstract】 Vitrification solutions were examined for their suitability of cryopreservation of turbot (Scophthalmus maximus) embryos. PMP1 gave higher survival rate (75.68%) than other vitrification solutions and was considered to be suitable for the cryopreservation of turbot embryos. The freezing point of the vitrification solutions consisted of PG and MeOH in the proportion of 3:2 was measured when the vitrification solutions were cryopreserved. It showed that the vitrification solutions with a cryoprotectant concentration of over 41% have no freezing point and the freezing points of vitrification solutions containing 33.33% - 40% cryprotectants were between -32.4℃ and -65.4℃. The freezing point decreased with the increase of cryoprotectant concentration. The resistance of turbot embryos at different stages to the cryoprotectants was studied. It was found that the turbot embryos from 4-5 pairs somite to tail bud were more resistant to cryoprotectants and suitable to vitrify. A live embryo was obtained after cryopreservation in liquid nitrogen for 14h and was hatched out.更多还原