PCR detection of the Wolbachia genes from different strains of Callosobruchus chinensis. (Outermost circle) Genome map of wMel as shown in Figure 1; (second circle) PCR detection of Wolbachia genes in the strain jC^Aus, as shown in Figure 1; (third circle) PCR detection of Wolbachia genes in the strains k10^U2 and r13^U1; (innermost circle) PCR detection of Wolbachia genes in the strain Rm^tet. Red and black lines indicate PCR-positive and PCR-negative genes, respectively.