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Phenotypic parameters and Heterosis of two tobacco F1 hybrids and their parents. (A) Photographs of the two hybrids and their parents used in this study. (B) Root number of F1 hybrid and its parents(G = G70, J = Jiucaiping No.2, GJ = G70 × Jiucaiping No.2, K = K326, KJ =K326 × Jiucaiping No.2). (C) Heterosis of two tobacco F1 hybrids (GJ and KJ). Error bars indicate standard error. Different small letters showed significant differences (P<0.05).
