Table 2 Results of mean regression between plant traits in saline conditions and SWP index

Traits in saline conditions	Coefficient value	Standard error	p-value
Intercept	7.506834	0.054184	2e-16^∗
Plant height (cm)	0.014669	0.009262	0.114
Flowering time (days)	-0.050227	0.012705	9.12e-05^∗
Ripening period (days)	-0.065254	0.100945	0.518
Ear number per plant	0.588800	0.127725	5.44e-06^∗
Grain number per ear	0.291359	0.031424	2e-16^∗

The three columns represent the estimated coefficient value, standard error and thep-value for the respective covariate in the model with SWP as the response, obtained by fitting a multiple mean regression model with sample size 404. The significantp-values are marked with a ‘*’, for a significance level of 0.05