Table 1.

Phenotypic variations of the five traits

Trait	Env.	Mean Ậ ± SD	Range	Skew	Kurt	CV%
PH	E1	*	*	*	*	*
	E2	*	*	*	*	*
	E3	125.87 ± 0.788	97.00–156.70	−0.03	0.33	11.17
	E4	128.77 ± 0.956	93.71–155.89	−0.48	0.39	12.41
BN	E1	6.91 ± 0.081	4.40–9.25	0.07	−0.31	16.78
	E2	6.15 ± 0.072	4.49–8.90	0.70	0.27	16.61
	E3	4.42 ± 0.083	4.20–7.80	0.10	0.48	24.28
	E4	7.56 ± 0.106	4.46–12.05	0.31	0.56	19.44
BY	E1	43.53 ± 0.943	21.63–71.74	0.38	−0.38	26.45
	E2	29.79 ± 0.642	15.86–77.86	1.77	8.38	26.35
	E3	46.54 ± 0.725	22.00–71.50	0.34	−0.07	19.01
	E4	41.03 ± 0.888	16.34–78.04	0.48	0.53	26.41
SY	E1	9.68 ± 0.265	4.11–18.11	0.34	−0.54	33.39
	E2	8.09 ± 0.179	4.12–19.47	1.08	1.82	26.95
	E3	9.67 ± 0.251	4.85–20.79	1.03	1.31	34.90
	E4	9.84 ± 0.236	4.38–18.16	0.44	−0.15	29.24
HI	E1	0.22 ± 0.003	0.15–0.33	0.43	−0.29	17.18
	E2	0.27 ± 0.003	0.17–0.34	−0.55	0.33	11.54
	E3	0.20 ± 0.004	0.15–0.36	1.32	2.94	20.06
	E4	0.24 ± 0.002	0.19–0.30	0.06	−0.38	9.71

Trait: PH plant height, BN branch number, BY biomass yield per plant, SY seed yield per plant, HI harvest index.

Env: E1 Huanggang in 2011, E2 Xiangyang in 2011, E3 Wuhan in 2012, E4 Xiangyang in 2012.

SD: standard deviation. CV(%): coefficient of variation.

*: data not collected.