【摘要】 香鱼是分布于中国、日本和朝鲜的一种珍稀名贵经济鱼类,本实验比较分析了香鱼养殖和野生群体的遗传多样性。研究结果显示,在长度为445 bp的控制区部分序列上,鳌山卫养殖群体的单倍型多样度h(0.198 4±0.092 4)和核苷酸多样度π(0.000 8±0.000 9)显著低于东张水库野生群体(h=0.810 5±0.067;π=0.002 6±0.002 0),两群体产生了较大的遗传分化(F st=0.447,P=0);单倍型邻接关系树的拓扑结构简单,未呈现明显的地理谱系结构,日本香鱼个体与中国香鱼亲缘关系较远;东张群体的历史动态分析结果表明其可能经历过近期的群体扩张事件。无论是养殖群体还是野生群体,中国香鱼群体的遗传多样性现状不容乐观。更多还原

【Abstract】 Plecoglossus altivelis is an important rare economic fish distributed along Chinese,Japanese and Korean coasts. In the present study,genetic diversity of hatchery and wild population was compared. A 445 bp fragment of control region was obtained. The haplotype diversity( 0. 198 4 ± 0. 092 4) and nucleotide diversity( 0. 000 8 ± 0. 000 9) of hatchery population were obviously low er than those of wild population( h =0. 810 5 ± 0. 067; π = 0. 002 6 ± 0. 002 0). Great differentiation was detected between these two populations( F st = 0. 447,P = 0. 000). The topology constructed by neighbour-joining tree indicated no significant genealogical structures for tw o populations. Individuals from Japan show ed a distant relationship with individuals from China. Mismatch distribution analysis indicated that P. altivelis may have experienced a recent population expansion. The present study indicated that current genetic situation of hatchery and wild populations was not optimistic.更多还原