TABLE 2.

Correlation coefficients between RSA-related and agronomy traits.

	TRL	RA	RD	RV	RT	RF	RDW	SDW	DRS	RN
PH	0.34**	0.35**	0.06	0.35**	0.27**	0.33**	0.34**	0.53**	−0.22*	0.15
SEL	0.30**	0.29**	–0.04	0.28**	0.23*	0.26**	0.26**	0.54**	−0.32**	0.14
TN	0.14	0.15	0.13	0.16	0.15	0.04	0.20*	0.23**	–0.02	0.15
SNS	–0.01	0.01	0.14	0.02	–0.03	0.03	0.02	–0.11	0.17	–0.02
TGW	0.05	0.06	0.06	0.07	0.01	0.07	0.08	0.16	–0.11	0.20*

TRL total root length, RA root area, RV root volume, RD root diameter, RT root tips, RF root forks, RDW root dry weight, SDW shoot dry weight, DRS dry root–shoot ratio, RN root number, PH plant height, SEL spike extension length, TN tiller number, SNS spikelet number per spike, TGW thousand-grain weight. * and ** mean significant difference at P < 0.05 and 0.01 probability level.