Table 2.

Comparison statistics on different constructed models using MLR, RBFNN and GEP techniques for PR, SL, STN, Vitri and QI of OHF and Pyrodwarf rootstocks during in vitro proliferation

Rootstock	Measured parameter	Model	RMSE	MARE	MBE	R2
OHF	PR	MLR	1.82	0.534	0.030	0.583
		RBFNN	0.69	0.138	− 0.014	0.957
		GEP	0.48	0.128	− 0.015	0.992
	SL	MLR	0.38	0.104	− 0.005	0.904
		RBFNN	0.14	0.034	0.012	0.990
		GEP	0.22	0.058	0.040	0.974
	STN	MLR	10.77	0.523	0.184	0.647
		RBFNN	6.95	0.211	0.118	0.882
		GEP	4.21	0.138	− 0.096	0.961
	Vitri	MLR	9.83	0.649	− 0.222	0.511
		RBFNN	5.27	0.169	− 0.351	0.883
		GEP	3.26	0.132	0.075	0.969
	QI	MLR	0.87	0.269	− 0.019	0.668
		RBFNN	0.52	0.155	− 0.028	0.891
		GEP	0.45	0.160	− 0.018	0.943
Pyrodwarf	PR	MLR	3.58	1.160	− 1.572	0.315
		RBFNN	1.49	0.379	0.087	0.908
		GEP	0.38	0.071	− 0.003	0.994
	SL	MLR	1.13	0.552	0.011	0.375
		RBFNN	0.43	0.194	− 0.007	0.924
		GEP	0.30	0.130	0.009	0.978
	STN	MLR	6.48	0.217	− 0.438	0.855
		RBFNN	5.42	0.158	− 0.456	0.906
		GEP	4.22	0.126	0.045	0.954
	Vitri	MLR	5.86	0.193	0.915	0.909
		RBFNN	5.56	0.158	− 0.499	0.901
		GEP	4.59	0.142	− 0.496	0.936
	QI	MLR	0.47	0.171	− 0.063	0.902
		RBFNN	0.43	0.163	0.032	0.923
		GEP	0.41	0.160	− 0.018	0.944