Combining gene expression programming and genetic algorithm as a powerful hybrid modeling approach for pear rootstocks tissue culture media formulation

Table 4 The factor components and range of experimental runs according to MS basal medium

Variables	Components	Range
Factor 1	KNO₃	0.5–2×
Factor 2	NH₄NO₃	0.5–2×
Factor 3 (mesos)	CaCl₂ KH₂PO₄ MgSO₄	0.5–2.5×
Factor 4 (minors)	CoCl₂·6H₂O CuSO₄·5H₂O H₃BO₃ Kl MnSO₄·H₂O Na₂MoO₄·2H₂O ZnSO₄·7H₂O FeNaEDTA	0.5–4×
Factor 5 (hormone)	BAP	0.5–2.5 mg l⁻¹
Factor 6 (hormone)	IBA	0.05–0.2 mg l⁻¹

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