Table 2.

Analysis of the five candidate barcode loci of Uncaria

Items	ITS2	rbcL	psbA–trnH	ITS	matK
Species numbers	14	15	10	14	7
Accession no.	77	63	49	58	10
Length range (average) (bp)	210–221 (220)	512–656 (608)	235–315 (287)	607–621 (616)	757–814 (808)
Average of GC content (%)	66.3	43.0	24.8	62.8	33.1
No. of variable sites in all taxa	41	16	173	86	13
No. of indels in all taxa	2	0	39	14	0
BLAST method (identification efficiency [%])	87.0	42.9	95.9	91.4	80
Nearest distance method (identification efficiency [%])	92.2	76.2	95.9	84.5	80