Table 2.

Variance Analysis of the traits measured under optimal growth and cold stress conditions, and by comparison between cold stress and optimal growth temperatures for 195 rice genotypes (192 Japanese accessions and three cold tolerant controls)

		MS
Source of variation	Df	Optimal (28°C)		Cold (13 °C)		Cold/Optimal
		CL28	RL28	CL13	RL13	RCL	RRL
Block	2	330.888	903.004	12.626	34.349	2324.314	1523.322
Genotypes	194	1.702**	8.761**	0.365**	0.782**	65.147**	33.803**
Accessions	191	1.472**	8.784**	0.29**	0.691**	65.290**	31.147**
Cold-tolerant controls	2	0.0751	6.662	0.39	4.6**	22.521	101.171**
Accessions vs Checks	1	48.669**	8.493	14.544**	10.356**	123.186*	406.287**
Error	388	0.316	4.408	0.191	0.489	30.772	17.710
CV (%)		11.045	14.905	31.49	42.19	9.467	5.983
Mean		5.094	14.086	1.388	1.657	58.592	70.328
Accessions mean		5.050	14.105	1.368	1.641	58.650	70.432
Cold-tolerant controls mean		7.920	12.906	2.649	2.722	54.921	63.661
Minimum value		3.125 (81)	6.604 (50)	0.558 (189)	0.436 (189)	46.764 (141)	59.935 (CT6748)
Maximum value		9.901 (42)	18.447 (39)	2.921 (QUILLA)	3.884 (QUILLA)	73.443 (189)	79.807 (189)

^**Significant at 1%

CL28, coleoptile length under optimal temperature; RL28, radicle length under optimal temperature; CL13, coleoptile length under cold stress; RL13, radicle length under cold stress; RCL, percentage of reduction in coleoptile length; RRL, percentage of reduction in radicle length.