Table 2. Phenotypic characteristics for grain traits in 532 rice accessions across 4 years.

Traits	Year	Maximum	Minimum	Mean	Standard deviation	Skewness	Kurtosis	Heritability in the broad sense %
Grain length (mm)	2010	12.91	6.44	8.09	0.99	1.68	3.60	98.76
	2011	12.71	6.26	8.10	0.97	1.62	3.54	98.88
	2012	13.27	6.40	8.11	1.02	1.64	3.45	99.07
	2013	12.78	6.42	7.97	1.08	1.71	3.34	96.33
Grain width (mm)	2010	4.39	2.22	3.21	0.40	−0.67	−0.08	96.17
	2011	4.38	2.06	3.20	0.42	−0.62	−0.14	95.79
	2012	4.42	2.21	3.18	0.37	−0.51	−0.20	97.87
	2013	4.04	1.98	3.14	0.43	−0.75	−0.40	93.60
Grain thickness (mm)	2010	2.94	1.79	2.22	0.18	0.36	0.96	97.37
	2011	3.00	1.68	2.21	0.19	0.12	0.93	96.88
	2012	3.12	1.71	2.21	0.20	0.45	0.56	95.65
	2013	3.07	1.73	2.20	0.20	0.42	0.39	95.34
1,000-grain weight (g)	2010	33.23	17.03	24.79	2.58	−0.11	0.15	96.19
	2011	32.29	16.21	24.95	2.52	−0.09	0.04	97.44
	2012	32.75	15.73	24.89	2.49	−0.09	0.23	95.97
	2013	32.62	16.17	24.59	2.54	−0.05	0.14	92.52