Phylogeographical Pattern and Population Evolution History of Indigenous Elymus sibiricus L. on Qinghai-Tibetan Plateau

• DOI: 10.3389/fpls.2022.882601
• Publication Date: 2022-06-29T07:53:44Z
• Authors: Mengli Han; Jingxue Zhang; Daxu Li; Shengnan Sun; Changbing Zhang; Chuanjie Zhang; Lijun Yan; Yongzhuo Guan; Lili Chen; Yuxia Guo; Minghong You; Wenlong Gou; Xinrui Li; Jiajun Yan; Shiqie Bai; Xuebing Yan
• Keywords: Elymus; Geographical distance; Isolation by distance

Elymus sibiricus L. is a perennial allotetraploid belonging to Triticeae of Poaceae, L., as the type species genus The existing geographical distribution pattern and genetic spatial structure E. on Qinghai–Tibetan Plateau (QTP) are not yet clear. In this study, population demography history 216 individuals from 44 populations QTP were studied used specific-locus amplified fragment sequencing (SLAF-seq). result diversity showed that there was no single center observed across all populations. results variation clearly divided into following three groups: Qinghai (Group I), South Tibet II), Hengduan Mountains III). From analyses AMOVA, Mantel test Treemix, strong differentiation low among within groups. Molecular dating indicated diverged at 16.08 Ma (during early Miocene) can be linked Himalayan Motion stage uplift. It speculated reasons affecting current phylogeographical follows: (1) environmental changes due uplift QTP; (2) geographic distance between (Groups I III close in distance, gene flow frequent); (3) Geographical barriers (the Tanggula Bayangela Groups II). This study provides new evidence historical perspective future exploration evolution