Table 1.

Effect of different combinations of 2,4-D and kinetin on callus induction of cultivar IR64 after 2 weeks of inoculation (150 seeds/medium formulation)

2,4-D (mg/l)	Kinetin (mg/l)	Seeds forming callus Number (%)			Seeds forming embryogenic calli Number (%)
		IR 64	Khongan	Taothabi	IR 64	Khongan	Taothabi
0.0	0.0	0	0	0	0	0	0
1.5	0.0	62	25	20	40	15	18
1.5	0.25	66	48	36	46	32	30
2.0	0.0	78	56	51	54	47	50
2.0	0.25	80	64	70	65	58	63
2.5	0.0	84	78	85	68	69	74
2.5	0.25	90	84	98	71	73	90
3.0	0.0	86	93	95	72	68	87
3.0	0.25	82	85	91	70	74	82