Table 4 Salt tolerance verification of multiple regression analysis with mean MFV.

Germplasm	STI_GR	STI_GI	STI_GE	STI_RL	STI_GVI	STI_FW	STI_WC	Mean MFV	Y
152505	0.936	0.836	0.676	0.230	0.193	1.087	1.228	0.71509	0.71629
156004	0.933	0.665	0.303	0.404	0.269	1.010	1.225	0.68799	0.68987
156017	0.913	0.637	0.319	0.451	0.287	0.901	1.111	0.67721	0.67925
156008	0.741	0.479	0.154	0.424	0.203	0.602	0.763	0.5017	0.5032
152478	0.876	0.785	0.688	0.115	0.091	0.449	0.499	0.49922	0.49972
152533	0.758	0.686	0.636	0.175	0.120	0.517	0.588	0.49903	0.49977
152209	0.879	0.424	0.030	0.166	0.071	0.728	0.824	0.41223	0.41273
151156	0.970	0.607	0.061	0.101	0.061	0.535	0.771	0.41185	0.41222
152101	0.727	0.505	0.152	0.176	0.089	0.643	0.738	0.41182	0.4124
156023	0.289	0.143	0.024	0.152	0.022	0.105	0.124	0.12933	0.12953
151072	0.107	0.043	0.000	0.135	0.006	0.019	0.847	0.12925	0.12924
152044	0.364	0.182	0.030	0.108	0.020	0.060	0.071	0.12675	0.12693
152059	0.061	0.015	0.000	0.099	0.001	0.042	0.048	0.04172	0.04177
152069	0.091	0.022	0.000	0.113	0.003	0.000	0.000	0.04115	0.04122
152237	0.091	0.022	0.000	0.081	0.002	0.027	0.032	0.04016	0.04021

The number in the first column refered to the sunflower germplasm line, followed by the salt tolerance index (STI) values for germination rate (STI_GR), germination index (STI_GI), germination energy (STI_GE), root length (STI_RL) and germination vitality index (STI_GVI), fresh weight (STI_FW) and water content (STI_WC). The regression formula was \(Y=0.143\times {{\rm{STI}}}_{GR}+0.146\times {{\rm{STI}}}_{GI}+0.152\times {{\rm{STI}}}_{GE}+0.213\times {{\rm{STI}}}_{RL}+0.369\times {{\rm{STI}}}_{GVI}+0.119\times {{\rm{STI}}}_{FW}+0.088\times {{\rm{STI}}}_{WC}\), and mean MFV-Y is the difference between Mean MFV and Y.

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