Table 2.

Contributions (% of sum of squares) of genotype (G), developmental stage (D), year (Y) and their interactions (G×D, D×Y, G×Y) to total variance in photosynthetic rate, leaf nitrogen content per unit area and stomatal conductance for CO₂ for the ten rice genotypes during the developmental period from panicle initiation to 2 weeks after heading in the field experiment

Factor	Photosynthetic rate	Leaf nitrogen content per unit area	Stomatal conductance for CO2
Genotype (G)	44·9**	56·7**	80·7**
Developmental stage (D)	16·3**	6·4**	1·0*
Year (Y)	1·8**	23·3**	0·8*
G×D	4·6*	4·0**	3·5
G×Y	2·6*	1·1*	2·5*
D×Y	18·8**	1·3**	1·0*
Total	89·0	92·7	89·5

*Significant at P=0·05; **significant at P=0·01.