Integrated quality evaluation strategy for multi-species resourced herb medicine of Qinjiao by metabolomics analysis and genetic comparation

Table 2 Sequence sizes, percent G+C content and mean distance intra/inter each spices of collected Qinjiao samples

Species	ITS2 length (bp)	G+C content (%)	Mean distance intra species	Mean distance inter species
Species	ITS2 length (bp)	G+C content (%)	Mean distance intra species	1	2	3
1 G. crassicaulis Duthie ex Burk.	495.8	56.0	0.0274
2 G. dahurica Fisch.	496.0	55.9	0.0229	0.0371
3 G. macrophylla Pall.	498.2	55.7	0.0062	0.0312	0.0246
4 G. straminea Maxim.	498.8	56.2	0.0130	0.0288	0.0220	0.0146