Table 1. Determination of mutation types in transgenic T0 poplar plants.

Target gene	No. of plants examined	No. of plants with mutations	Mutation rate (%)	Putative homozygous		Putative heterozygous
				Number	%	Number	%
PtoPDS	59	30	51.7	28	93.2	2	6.7
CK	42	0	0	ND	ND	ND	ND

CK, Empty vector. ND, Not determined.