Table 2.

Regression statistics of Grain filling rate and ZmSMR gene expression: univariate and multivariate linear regression

Dependent variable	Independent variable–univariate regression (r)a												Multivariate Rab
	ZmSMR1	ZmSMR2	ZmSMR3	ZmSMR4	ZmSMR5	ZmSMR6	ZmSMR7	ZmSMR8	ZmSMR9	ZmSMR10	ZmSMR11	ZmSMR12
Grain filling rate	0.698(−)	0.349	0.139(−)	0.189(−)	0.34(−)	0.522(−)	0.196(−)	0.267(−)	0.2(−)	0.374(−)	0.267(−)	0.55(−)	0.977
Regression coefficient significance	0.001	0.121	0.547	0.411	0.132	0.015	0.393	0.243	0.384	0.095	0.242	0.010	0.001

(−) indicates negative linear relationship

^ar indicates the coefficient of determination of the independent variable, the significance was checked by t-test

^bRa = adjusted r of the multiple linear regression model and the significant probability from the ANOVA table in the multiple linear regression model