Comparison of PCR products amplified using SSR primers and different types of adapter-primers. (A) PCR products amplified using SSR primers and U-primers. M, 20 bp DNA Marker (Takara, Dalian, China); lanes 1–4, phi085; lanes 5–8, U-phi085; lanes 9–12, phi041; lanes 13–16, U-phi041; lanes 17–20, phi123; lanes 21–24, U-phi123; lanes 25–28, umc1478; lanes 29–32, U-umc1478; lanes 33–36, umc1268; lanes 37–40, U-umc1268; Zhengdan 958: lanes 1, 2, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 30, 33, 34, 37, 38; Xianyu 335: lanes 3, 4, 7, 8, 11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 31, 32, 35, 36, 39, 40. (B) PCR products amplified using U-primers and C-primers. M, 20 bp DNA Marker (Takara); lanes 1–4, U-phi085; lanes 5–8, C-phi085; lanes 9–12, U-phi041; lanes 13–16, C-phi041; lanes 17–20, U-phi123; lanes 21–24, C-phi123; lanes 25–28, U-umc1478; lanes 29–32, C-umc1478; lanes 33–36, U-umc1268; lanes 37–40, C-umc1268; Zhengdan 958: lanes 1, 2, 5, 6, 9, 10, 13, 14, 17, 18, 21, 22, 25, 26, 29, 30, 33, 34, 37, 38; Xianyu 335: lanes 3, 4, 7, 8, 11, 12, 15, 16, 19, 20, 23, 24, 27, 28, 31, 32, 35, 36, 39, 40.