蓝花长尾鲫是金鱼和彩鲫杂交后代,经4代选育而育成的一个新品种。蓝花长尾鲫的外形性状发生了很大变化,与两亲本明显不同,其遗传基础是否发生了变化,为此研究了本品种的核型。染色体是鱼类遗传的物质基础,鱼类的遗传变异,染色体起着重要作用。对鱼类染色体的核型分析已有较久的历史,在现有25万种鱼类中,Ojima(1976)报道了430种; Blue-tail long-tailed crucian carp is a hybrid of goldfish and color crucian carp, after 4 generations breeding and bred a new breed. The morphological characteristics of the blue-tailed crucian carp have undergone great changes, which are obviously different from those of the parents and whether their genetic basis has changed. Therefore, the karyotypes of this species have been studied. Chromosomes are the material basis of fish genetic, genetic variation of fish, chromosomes play an important role. Karyotype analysis of fish chromosomes has been around for a long time. Among the existing 250,000 species of fish, Ojima (1976) reported 430 species;