Table 1. Yield and yield components in F_{2: 3}, F_{2: 4} populations and mid-parent heterosis in F₁ and F₂ generations.

Trait	Mean	SD	Min	Max	GX1135	GX100-2	Xinza No.1	Mid-parent heterosis (%)
S1/N1 a
SY b	4.16/2.70	0.80/0.49	2.17/1.47	6.65/4.16	3.66	3.75	5.78	56.23
LY	1.69/1.06	0.32/0.21	0.88/0.58	2.71/1.60	1.55	1.37	2.37	62.01
BNP	15.05/20.20	2.23/3.06	10.17/13.75	20.21/29.67	18.11	16.15	20.34	18.74
BW	5.27/5.95	0.56/0.63	3.34/4.54	6.67/7.56	5.45	5.67	5.57	0.18
LP (%)	40.56/39.16	1.90/1.98	34.47/33.32	45.25/46.05	42.49	36.49	40.91	3.60
S2/N2 a							F2
SY b	1.67/3.68	0.26/0.67	0.98/1.84	2.50/5.62	2.92	2.23	3.55	38.13
LY b	0.62/1.53	0.14/0.28	0.35/0.73	0.93/2.32	1.17	0.82	1.42	43.31
BNP	15.24/17.35	1.96/3.13	11.29/10.57	20.93/27.45	21.99	13.58	24.86	39.80
BW	4.29/5.14	0.41/0.47	3.01/3.70	5.20/6.29	4.67	4.60	4.98	7.50
LP (%)	36.91/41.58	1.73/1.88	32.89/34.19	42.00/45.79	40.17	36.66	40.10	4.38

SY: seed cotton yield; LY: lint yield; BNP: bolls per plant; BW: boll weight; LP: lint percent

^a S1/N1: F_2:3 family (S1: 2008Handan, N1:2008Cangzhou), S2/N2: F_2:4 family(S2: 2009Handan, N2: 2009Cangzhou) (the same below)

^b t/ha

Results in each cell are presented as S/N