Table 1.

Analysis of variance for metribuzin tolerance and associated traits and their heritability estimates in the 137 RILs of Chuan Mai 25 × Ritchie mapping population.

Category	MSg	MSe	${\delta }_g^2$	${\delta }_e^2$	${\delta }_p^2$	h2
Visual score	12.96**	2.73	3.41	0.91	4.32	0.79
Mean value of chlorophyll content for treatment	143.33**	24.75	39.53	8.25	47.78	0.83
Mean value of chlorophyll content for control	45.09**	18.16	8.98	6.05	15.03	0.60
Reduction of chlorophyll content	174.75**	45.19	43.19	15.06	58.25	0.74

MSg, mean square of genotype; MSe, mean square of random error; ${\delta }_g^2$, estimated genetic variance; ${\delta }_p^2$, estimated phenotypic variance; ${\delta }_e^2$, estimated error variance; h², broad-sense heritability.

** indicates significant difference at p < 0.01.