title: Phylogenetic affinity of tree shrews to Glires is attributed to fast evolution rate.
abstract: Previous phylogenetic analyses have led to incongruent evolutionary relationships between tree shrews and other suborders of Euarchontoglires. What caused the incongruence remains elusive. In this study, we identified 6845 orthologous genes between seventeen placental mammals. Tree shrews and Primates were monophyletic in the phylogenetic trees derived from the first or/and second codon positions whereas tree shrews and Glires formed a monophyly in the trees derived from the third or all codon positions. The same topology was obtained in the phylogeny inference using the slowly and fast evolving genes, respectively. This incongruence was likely attributed to the fast substitution rate in tree shrews and Glires. Notably, sequence GC content only was not informative to resolve the controversial phylogenetic relationships between tree shrews, Glires, and Primates. Finally, estimation in the confidence of the tree selection strongly supported the phylogenetic affiliation of tree shrews to Primates as a monophyly.
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: linjiannan0111@163.com.
authors: Jiannan
authors: J
authors: Lin
authors: Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchangzhong Rd, Shanghai 200072, China. Electronic address: gfchen2006@gmail.com.
authors: Guangfeng
authors: G
authors: Chen
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: guliang@tongji.edu.cn.
authors: Liang
authors: L
authors: Gu
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: 659feng@tongji.edu.cn.
authors: Yuefeng
authors: Y
authors: Shen
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: 635108435@qq.com.
authors: Meizhu
authors: M
authors: Zheng
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: wisense@2008.sina.com.
authors: Weisheng
authors: W
authors: Zheng
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: xinjie_hu@yeah.net.
authors: Xinjie
authors: X
authors: Hu
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: zhangxb@tongji.edu.cn.
authors: Xiaobai
authors: X
authors: Zhang
authors: Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchangzhong Rd, Shanghai 200072, China. Electronic address: yuqiu2012@gmail.com.
authors: Yu
authors: Y
authors: Qiu
authors: Shanghai Tenth People's Hospital, Tongji University School of Medicine, 301 Yanchangzhong Rd, Shanghai 200072, China. Electronic address: xqliu@tongji.edu.cn.
authors: Xiaoqing
authors: X
authors: Liu
authors: Shanghai Tenth People's Hospital, Shanghai Key Laboratory of Signaling and Disease Research, The School of Life Sciences and Technology, Tongji University, Shanghai 200120, China. Electronic address: czjiang@tongji.edu.cn.
authors: Cizhong
authors: C
authors: Jiang
mesh_terms: D000818:Animals; D001482:Base Composition; D003062:Codon; D016678:Genome; D006801:Humans; D008322:Mammals / Q000235:genetics*; D010802:Phylogeny; D017422:Sequence Analysis, DNA; D014418:Tupaiidae / Q000235:genetics*
chemical_list: D003062:Codon
keywords: Evolution rate; Mammalian phylogeny; Phylogenomics; Tree shrew