Table 2.

Analysis of variance (F-values) for GY, grain components and some physiological traits of rice among years, varieties and treatments.

Source of variation	df	GY	SPN	FG	CH	LWP	ALTG	Pn	Gs	Tr	IWUE	Δ
Year (Y)	1	0.08 ns	0.05 ns	0.02 ns	20.5**	748**	12.6**	1.52 ns	4.20 ns	8.38*	2.19 ns	5.01*
Varieties (V)	1	3.33 ns	12.2**	5.81*	248**	227**	68.5**	1.56 ns	1.09 ns	63.0**	28.5**	100**
Treatment (T)	1	352**	137**	159**	230**	469**	574**	142**	176**	509**	119**	1.13 ns
Y × V	1	19.9**	0.79 ns	3.40 ns	9.21 ns	319**	83.5**	2.01 ns	0.37 ns	22.7**	3.82 ns	1.68 ns
Y × T	1	15.5**	0.15 ns	10.6**	14.9**	80.5**	75.8**	0.16 ns	1.26 ns	0.08 ns	2.42 ns	19.0**
V × T	1	1.95 ns	1.66 ns	0.50 ns	52.0**	9.83**	45.8**	0.37 ns	4.52 ns	3.47 ns	0.29 ns	3.13 ns

Grain yield, GY; Spikelets per panicle, SPN; Filled grains, FG; Chalkiness, CH; Leaf water potential, LWP; Air-leave temperature gap, ALTG; Net photosynthetic, P_n,; Stomatal conductance, G_s; Instantaneous water use efficiency, IWUE; Carbon isotope discrimination, Δ.

*Significant at the 0.05 probability level.

**Significant at the 0.01 probability level.