Table 3.

Correlation coefficients (r) among different physiological traits under irrigated conditions

	Yield	Tap root length	Lateral root length	Root/shoot weight	Canopy temperature	SPAD value	Specific leaf weight	Photosynthesis ratio	Fv/Fm	Wax content
Tap root length	0.29
Lateral root length	0.29	0.82**
Root/shoot weight	0.36	0.89**	0.67**
Canopy temperature	− 0.73**	− 0.47	− 0.51*	− 0.52*
SPAD value	0.67**	0.44	0.24	0.48	− 0.58*
Specific leaf weight	0.68**	0.30	0.41	0.30	− 0.45	0.54*
Photosynthesis	0.78**	0.35	0.22	0.40	− 0.64**	0.92**	0.46
Fv/Fm ratio	0.82**	0.42	0.25	0.53*	− 0.66**	0.91**	0.59*	0.92**
Wax content	0.47	0.70**	0.56*	0.66**	− 0.69**	0.42	0.42	0.34	0.43

*,**Significant at P = 0.05 and P = 0.01, respectively