Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub


    Two chloroplast intergenic spacers (trnD-trnT and rps16-trnK) were used to study the phylogeographical structure of Helianthemum songaricum in northwestern China, with 12 haplotypes detected. Phylogenetic analysis showed that H. songaricum comprised two lineages, one distributed in the Yili Valley and the other in the western Ordos Plateau. Nested clade phylogeographic analysis likewise indicated that haplotypes in the Yili Valley and those in the western Ordos Plateau formed sister monophyletic clades. This lineage split was also supported by AMOVA analysis and the Mantel test. AMOVA showed that 99.41% of variance in H. songaricum occurred between the two distribution regions, and correlation between genetic differentiation and geographical distances was significant (r2 = 0.877, P\0.0001). All populations in the Yili Valley shared haplotype A with high frequency, and range expansion was detected by nested clade analysis and strongly supported by negative Fu's FS-values, Tajima's D-values, and mismatch distribution analysis. We speculate that aggravation of the dry and cold climate during the early Quaternary, combined with plant physiological features, were determining factors contributing to the lineage split, and climate oscillations most likely led to the Yili range expansion. The high drift load (FST = 0.9923, GST = 0.663) and inbreeding load (HS = 0.219) of H. songaricum indicate a significant extinction risk, and protective measures should be taken immediately.

    Publication Notes

    • You may send email to to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Su, Zhihao; Zhang, Mingli; Sanderson, Stewart C. 2011. Chloroplast phylogeography of Helianthemum songaricum (Cistaceae) from northwestern China: implications for preservation of genetic diversity. Conservation Genetics. doi: 10.1007/s10592-011-0250-9.


    Google Scholar


    chloroplast DNA, Helianthemum, phylogeography, Yili Valley, western Ordos Plateau

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page