Fig. 3

Geographic distribution and population structure of different cannabis accessions. A Geographic locations of the Chinese accessions. The map was downloaded from the website of the Ministry of Natural Resources of the People's Republic of China (http://bzdt.ch.mnr.gov.cn), and the drawing review number is GS (2019) 1659. Each red or green dot on the map represents one accession, and these samples were collected by the author. The black triangle and blue box indicate the sample locations described by Ren et al. [25] and Gao et al. [28], respectively. B Principal component analysis results of 52 samples (including five samples outside China). DC: Drug cannabis (marijuana), EFC: European cannabis grown for fibre, EC: Eastern China Cannabis, NC: Northwestern China cannabis, NEC: Northeastern China cannabis, NWC: Northwestern China cannabis, SWC: Southwestern China Cannabis. C Neighbour-joining tree of the 52 samples based on all the SNPs identified, with 1000 bootstrap replications. The values at the nodes represent the bootstrap values. D Population structure of the 52 samples. Each colour represents one population. Each sample is represented by a vertical bar, and the length of each coloured segment represents the proportion contributed by ancestral populations