Fig. 1

The genotype of ITS1 in the four kinds of fish. Channel 1: 0.1 kb DNA grad mark. Channel 2: PCR results of ITS1 in BSB. Channel 3: PCR results of ITS1 in TC. Channel 4: PCR results of ITS1 in F₁ hybrids of BSB × TC. Channel 5–7: PCR results of ITS1in F₂ hybrids of BSB × TC