Table 8.

Pearson correlation between grain yield and other agro-morphological parameters for sorghum lines with variable early-season cold tolerance and susceptibility evaluated at three planting dates in West Texas.

Categories	Assessed parameters	Early planting	Mid planting	Standard Planting
Plant morphology	Number of leaves	ns	ns	0.14*
	Days to flowering	ns	ns	ns
	Plant height	− 0.27**	0.23**	0.15*
	Basal tiller	ns	ns	ns
	Nodal tillers	− 0.13*	− 0.29**	− 0.18*
	Stem diameter	0.14*	0.34**	0.29**
	Peduncle length	− 0.15*	− 0.27**	ns
Panicle size	Panicle length	0.22**	0.39**	0.45**
	Panicle width	0.28**	0.68**	0.76**
	Panicle area	0.29**	0.63**	0.75**
Yield related	Panicle weight	0.51**	0.81**	0.89**
	Vegetative biomass	0.24**	0.45**	0.20**
	Total biomass	0.48**	0.74**	0.63**
	Panicle harvest index	0.28**	0.45**	0.45**
Seedling	Final germ. percent	0.52**	0.29**	0.26**
	Vigor rating	0.41**	0.31**	0.22**
	Seedling chlorophyll	0.16*	ns	ns
	Seedling biomass	0.45**	0.32**	0.29**
	Anthesis chlorophyll	0.22**	ns	ns

**, *Indicate significance at p ≤ 0.01 and p ≤ 0.05 respectively.