Fig 1.
The collection information of Astragalus mongholicus.
A. mongholicus were collected for three main producing areas, Inner Mongolia, Shanxi, Gansu province in China. The collection sites and habitat of A. mongholicus were shown.
Fig 2.
The analysis of chemical components in Astragalus mongholicus.
The content of main chemical organic constituents and inorganic elements in the root of A. mongholicus were determined. PCA were performed to analyze the chemical components from different origins. (a) The chemical content of main organic constituents; (b) The chemical content of inorganic elements; (c) The loading diagram of chemical components; (d) The PCA analysis of chemical components from different origins.
Fig 3.
The maximum likelihood (ML) trees of Astragalus mongholicus based on DNA barcodes.
The ML trees were built by MEGA 6.0 for analyzing the genetic variation of A. mongholicus from different origins. (a) The ML tree of ITS for A. mongholicus; (b) The ML tree of ITS2 for A. mongholicus; (c) The ML tree of psbA-trnH for A. mongholicus.
Fig 4.
The loading diagram and PCA of climatic and edaphic traits for Astragalus mongholicus from different origins.
The loading diagram and PCA were conducted by SPSS 22.0. (a) The loading diagram of climatic traits for A. mongholicus; (b) The PCA of climatic traits for A. mongholicus; (c) The loading diagram of edaphic traits for A. mongholicus; (d) The PCA of edaphic traits for A. mongholicus.
Table 1.
ANOVA analysis for four factors.
Fig 5.
The correlation analysis of chemical components and genetic, climatic and edaphic traits.
The correlation analysis was performed based on the loading diagram, PCA and ANOVA analysis of four factors.