Table 1. Gene constructs and derived root cultures.

	Number of root lines
Gene constructs	Total	Hgr+	PCR-positive	Established root lines
STR	53	48	17	S8, S14, S16, S26
G10H	34	31	5	G1, G3, G10
G10H + STR	95	88	21	SG1, SG20, SG26, SG28, SG43