1 Supplemental figure 1 2 Schematic representation of the principle of transgene mapping. Solid bars indicate 3 chromosome pair which contains the exogenous DMY in the individuals. Blue horizontal 4 lines indicate the position of the DNA marker on the chromosome. The concordance rate is 5 expected to be 100% in the locus adjacent to the exogenous DMY. 6 7 Supplemental figure 2 8 Determination of real-time PCR efficiencies of target gene (DMY) and reference genes 9 (Elf1a and β-Actin) for quantification of the copy number (a) and the expression levels (b). 10 Threshold cycles and volume of the template were plotted to calculate the slope (mean 11 value; n=3). The corresponding real-time PCR efficiencies were calculated according to the 12 equation: E=10[-1/slope] (Rfaffl, 2001). Under the condition that Etarget = Ereference = 2, the 13 comparative Ct method is applicable for a quick estimation of the relative ratio 14 2001). (Pfaffl, 15 16 Supplemental figure 3 17 Light micrographs of adult testes in Hd-rR inbred strain (a), DMY transgenic strain 1 (b) and 18 2 (c). ed, efferent duct; Scale bars, 100μm 19 1