caa a22 4500 445857242 CHVBK 20180317145431.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10592-011-0250-9 doi (NATIONALLICENCE)springer-10.1007/s10592-011-0250-9 Chloroplast phylogeography of Helianthemum songaricum (Cistaceae) from northwestern China: implications for preservation of genetic diversity [Elektronische Daten] [Zhihao Su, Mingli Zhang, Stewart Sanderson] 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 (r 2=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 F S-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 (F ST=0.9923, G ST=0.663) and inbreeding load (H S=0.219) of H. songaricum indicate a significant extinction risk, and protective measures should be taken immediately. Springer Science+Business Media B.V., 2011 Chloroplast DNA nationallicence Helianthemum nationallicence Phylogeography nationallicence Yili Valley nationallicence Western Ordos Plateau nationallicence Su Zhihao Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China aut Zhang Mingli Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China aut Sanderson Stewart Shrub Sciences Laboratory, Intermountain Research Station, Forest Service, U.S. Department of Agriculture, 84601, Utah, USA aut Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1525-1537 1566-0621 12:6<1525 2011 12 10592 https://doi.org/10.1007/s10592-011-0250-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-011-0250-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Su Zhihao Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China aut NATIONALLICENCE 700 1- Zhang Mingli Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, 830011, Urumqi, China aut NATIONALLICENCE 700 1- Sanderson Stewart Shrub Sciences Laboratory, Intermountain Research Station, Forest Service, U.S. Department of Agriculture, 84601, Utah, USA aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/6(2011-12-01), 1525-1537 1566-0621 12:6<1525 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer