Table 2. Degrees of freedom (df) and F-values for physiological, phenological, and yield traits.

Traits	df	F-values
	(T× G)	Temperature (T)	Genotype (G)	T × G
Leaf temperature,°C	19	2610.05 ***	11.06 ***	3.16 ***
Flag leaf chlorophyll, SPAD unit	19	147.5 **	10.67 ***	3.43 ***
Maximum quantum yield of PS II (Fv/Fm), unitless	19	289.21 ***	4.14 ***	3.57***
Superoxide dismutase (SOD), enzyme unit mg protein-1†	18	14.68 ***	7.03 ***	3.83 ***
Superoxide anion, Δ optical density min-1 g-1 fresh weight	19	5.5 *	1.18 NS	1.42 NS
Days to anthesis	19	0.18 NS	17.47***	0.53 NS
Spike number per plant	19	0.36 NS	5.12 ***	0.65 NS
Grain number per spike	19	0.09 NS	47.11 ***	1.61 NS
Individual grain weight, mg	19	861.18 ***	17.38 ***	3.55 ***
Grain yield, g plant-1	19	54.12 **	10.54 ***	2.19 **

*, **, and *** denotes significance at 0.05, 0.01, and 0.001 probability levels, respectively.

^NS, non-significant at the 0.05 probability level.