TABLE 5.

Correlation coefficients between root traits and yield traits.

Environments	Traits	SPA	GPS	TKW	GY
IHC	TRL	0.016	–0.115	0.190**	–0.02
	TRA	–0.015	–0.113	0.194**	–0.033
	ARD	–0.084	0.009	0.047	–0.023
	TRV	–0.032	–0.104	0.175*	–0.038
	NRT	0.029	0.006	–0.067	−0.189**
	RDW	–0.066	–0.059	0.078	–0.063
	V	0.294
OHC	TRL	–0.019	–0.09	0.178*	–0.104
	TRA	0.031	–0.137	0.202**	–0.116
	ARD	0.092	−0.145*	0.037	0.065
	TRV	0.064	−0.15*	0.199**	–0.088
	NRT	–0.104	–0.097	0.123	−0.183*
	RDW	–0.078	–0.061	0.134	–0.124
	V	0.407***
OPC	TRL	0.009	–0.115	0.135	−0.146*
	TRA	–0.033	–0.128	0.198**	−0.157*
	ARD	–0.048	–0.039	0.040	–0.052
	TRV	–0.063	–0.115	0.213**	–0.123
	NRT	–0.017	–0.070	0.055	−0.150*
	RDW	–0.039	−0.141*	0.158*	–0.138
	V	0.406***
WP at OPC	RDW	–0.069	–0.04	0.163*	–0.009
JS at OPC	RDW	–0.039	–0.02	–0.005	–0.037
MS at OPC	RDW	–0.008	0.108	–0.074	–0.066

GY, grain yield per area; SPA, spikes per area; GPS, grains per spike; TKW, thousand- kernel weight. *, Significant at p ≤ 0.05; **, Significant at p ≤ 0.01; ***, Significant at p ≤ 0.001.