TABLE 3.

The survey results of yield related traits of the transgenic maize lines with ZmIPT2 gene.

Transgenic	Line	Ear height (cm)	Ear diameter (mm)	Cob diameter (mm)	Bald tip length (cm)	Grain length (mm)	Grain width (mm)	Grain thickness (mm)	100-grain weight (g)	Yield per plot (kg)	Yield plot increased
T2	C01	13.87 ± 0.29	46.45 ± 0.04	29.08 ± 1.62	0.00 ± 0.00	10.51 ± 1.11	9.32 ± 0.48	4.95 ± 0.58	30.41 ± 3.09	5.34 ± 0.03
	DNIPT2-C14	15.20 ± 0.75**	45.33 ± 0.11	29.95 ± 1.20	0.57 ± 0.06*	11.49 ± 1.25*	9.11 ± 0.51	5.04 ± 0.20	30.80 ± 0.01	5.59 ± 0.01**	4.68%
	DNIPT2-C33	13.90 ± 0.70	49.17 ± 0.65*	31.70 ± 0.82	0.00 ± 0.00	11.48 ± 1.57*	8.09 ± 0.88	5.76 ± 0.62**	33.58 ± 0.00**	5.82 ± 0.00**	8.99%
	DNIPT2-C34	15.83 ± 0.64**	46.78 ± 1.74	32.23 ± 3.79*	0.47 ± 0.31	11.41 ± 0.35*	7.82 ± 0.24	5.24 ± 0.52	31.68 ± 0.00	5.66 ± 0.00**	5.99%
T3	C01	12.93 ± 0.33	42.61 ± 1.84	30.16 ± 0.66	0.00 ± 0.00	10.31 ± 0.19	8.51 ± 0.22	4.70 ± 0.46	27.32 ± 0.47	4.09 ± 0.24
	DNIPT2-C14	17.23 ± 0.78**	44.80 ± 1.07**	27.97 ± 1.11*	0.83 ± 0.46**	10.36 ± 0.08	9.22 ± 0.35	5.29 ± 0.16	32.10 ± 0.08**	4.92 ± 0.20**	20.29%
	DNIPT2-C33	13.47 ± 0.52	45.71 ± 0.31**	31.19 ± 0.63	0.73 ± 0.23*	9.69 ± 0.33	7.92 ± 0.32	5.45 ± 0.48	31.20 ± 0.37**	4.79 ± 0.08**	17.11%
	DNIPT2-C34	14.90 ± 0.35*	48.58 ± 0.59**	33.25 ± 1.27	0.17 ± 0.17	10.20 ± 0.24	8.35 ± 0.15	5.81 ± 0.28	31.10 ± 0.78**	4.90 ± 0.08**	19.80%

Plants were grown in the molecular breeding experimental base at Northeast Agricultural University (Harbin, China) in a randomized comparative trial with three replications. The row spacing was 65 cm, the length was 2.0 m and the plant spacing was 2 cm. The results are presented as mean ± SD (n = 3). Asterisk (**) indicates extremely significant differences at P\0.01 according to Student’s t-test. Asterisk (*) indicates significant differences at P\0.05 according to Student’s t-test.