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Gel region showing the detection of genetic purity of a maize seed lot. M, 20 bp DNA Marker (Takara); lanes 1–10 contain five pairs of U-primers (U-phi085, U-phi041, U-phi123, U-umc1478 and U-umc1268); lanes 1–2, standard bands of Zhengdan 958 (for convenience, the standard bands of only two seeds are shown); lanes 3–6, female parent’s bands of Zhengdan 958; lanes 7–10, the bands generated from off-type seeds.
