Phylogenetics and dispersal patterns of Brassicaceae around the Qinghai-Tibet Plateau  

作　　者：Chaoju Qian Yong Shi Yuan Liu Xia Yan Xiao-Fei Ma 

机构地区：[1]Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Department of Ecology and Agriculture Research,Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China [2]University of Chinese Academy of Sciences, Beijing 100049, China [3]Key Laboratory of Eco-hydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences,Lanzhou 730000, China

出　　处：《Journal of Systematics and Evolution》2018年第3期202-217,共16页植物分类学报（英文版）

摘　　要：Brassicaceae, one of the most diverse and economically valuable plant families, is distributed all over the world. Previous studies have suggested that Brassicaceae originated and diversified in the Old World. In this study, the phylogenetic relationships of 17 tribes of Brassicaceae from the Qinghai-Tibet Plateau （QTP） and adiacent areas were investigated using nuclear ribosomal internal transcribed spacer （nrlTS） and chloroplast DNA sequence data （rbcL and petB-petD） with maximum likelihood, maximum parsimony, and Bayesian methods. As suggested by both the nrlTS and chloroplast DNA trees, Gardaria pubescens （C.A.Mey.） Jarm. （Lepidieae） and Draba lanceolata Royle （Arabideae） should be classified in the Eutremeae and Cardamineae, respectively. Based on over 700 newly sequenced and published nrlTS sequences of Brassicaceae, an up-to-date comprehensive phylogeny of the family was reconstructed using the maximum likelihood method. In the phylogenetic tree, 10 monophyletic tribes were detected. They were used to clarify the lineage diversification and dispersal patterns of the lo tribes. The results showed that most of the monophyletic tribes may have originated in different regions of the world, and then dispersed into other regions surrounding the QTP. Rapid lineage diversification rate shifts were detected in several tribes, such as Anastaticeae, which experienced a rapid shift event -1.38 Mya, corresponding to the rapid uplift of the QTP, indicating that the recent uplift of the QTP could have promoted diversification in Brassicaceae across and adjacent to the QTP.Brassicaceae, one of the most diverse and economically valuable plant families, is distributed all over the world. Previous studies have suggested that Brassicaceae originated and diversified in the Old World. In this study, the phylogenetic relationships of 17 tribes of Brassicaceae from the Qinghai-Tibet Plateau （QTP） and adiacent areas were investigated using nuclear ribosomal internal transcribed spacer （nrlTS） and chloroplast DNA sequence data （rbcL and petB-petD） with maximum likelihood, maximum parsimony, and Bayesian methods. As suggested by both the nrlTS and chloroplast DNA trees, Gardaria pubescens （C.A.Mey.） Jarm. （Lepidieae） and Draba lanceolata Royle （Arabideae） should be classified in the Eutremeae and Cardamineae, respectively. Based on over 700 newly sequenced and published nrlTS sequences of Brassicaceae, an up-to-date comprehensive phylogeny of the family was reconstructed using the maximum likelihood method. In the phylogenetic tree, 10 monophyletic tribes were detected. They were used to clarify the lineage diversification and dispersal patterns of the lo tribes. The results showed that most of the monophyletic tribes may have originated in different regions of the world, and then dispersed into other regions surrounding the QTP. Rapid lineage diversification rate shifts were detected in several tribes, such as Anastaticeae, which experienced a rapid shift event -1.38 Mya, corresponding to the rapid uplift of the QTP, indicating that the recent uplift of the QTP could have promoted diversification in Brassicaceae across and adjacent to the QTP.

关 键 词：Brassicaceae dispersal pattern eastern Asia phylogenetic relationship Qinghai-Tibet Plateau （QTP）. 

分 类 号：Q945.11[生物学—植物学] TQ320.52[化学工程—合成树脂塑料工业]