天鹅洲通江型长江故道“四大家鱼”种群遗传结构研究

利用淀粉胶电泳技术，对天鹅洲通江型故道青鱼（Ｍｙｌｏｐｈａｒｙｎｇｏｄｏｎｐｉｃｅｕｓ）（６０尾），草鱼（Ｃｔｅｎｏｐｈａｒｙｎｇｏｄｏｎｉｄｅｌｕｓ）（４０尾），鲢（Ｈｙｐｏｔｈａｌｍｉｃｈｔｈｙｓｍｏｌｉｔｒｅｉｘ）（４０尾），鳙（Ａｒｉｓｔｉｃｈｔｈｙｓｎｏｂｉｌｉｓ）（４０尾）的心、眼、脑、白肌、肝五种组织中ＬＤＨ、ＭＤＨ、Ｇ６ＰＤＨ及ＥＳＴ四种同工酶进行分析，并对这几种酶的一系列基因座位作了比较和定位，以此分别计算青、草、鲢、鳙的种群遗传变异率，为构建通江型长江故道“四大家鱼”种质资源生态库提供重要依据。

STUDY ON THE POPULATION GENETIC STRUCTURES OF BLACK CARP, GRASS CARP, SILVER CARP AND BIGHEAD FISH IN TIAN-E-ZHOU OPEN OLD COURSE OF THE YANGTZE RIVER

Through starch gel electrophoresis, four allozymes (LDH, MDH, G6PDH and EST) extracted respectively from five tissues (heart, eye, brain, white muscle and liver) of 60 black carp (Mylopharyngodon piceus), 40 grass carp (Ctenopharyngodon idellus), 40 silver carp (Hypophthalmichthys molitrix ) and 40 bighead fish (Aristichthys nobilis) sampled from Tian-e-zhou open old course of the Yangtze River, were analyzed. The gene loci, for these enzymes were compared and determined. Moreover, genetic veriations of the populations of black carp, grass carp, silver carp and bighead fish were figured out separately. These results built a solid foundation for setting up the ecological pools of germplasm resources of black carp, grass carp, silver carp and bighead fish in the open old course of the Yangtze River.