populations [“Pujiang No.1”selected strain F₇(PJ)two domesticated populations(HX, GA) as well as four wild populations(LZ, YN, SS, JL)] of blunt snout bream () were analyzed by using combined nucleotide sequences of control region and CO I gene of mitochondrial DNA (mtDNA). The results showed that: (1) Sixty-four haplotypes were defined in analyzed seven populations, in which no haplotype was shared among populations. (2) The haplotype diversity(), number of variable sites,) were 0.857–0.943, 31–40, 0.275%–0.461% and 4.043–6.800respectively in four wild populations. The four corresponding parameters were 0.714–respectively in two domesticated populations, which were lower than those in the four wild populations. Likewise, those parameters were 0.8430.193% and 2.843, which were lower than those in the four wild populations but higher than those in two domesticated populations. The above four genetic diversity parameters showed the same trend of change among seven populations. (3) For the seven populations studied, 0.003 value between populations ranged from 0.010_ST value between populations<0.05) between GA, HX and PJ populations, but no significant >0.05) were detected between four wild populations. strictly and orderly scientific breeding) had a strong impact on the population genetic structure, ing difference in genetic variability and genetic differentiation between different types of genetic-ecological