Phylogenomic analysis of transcriptomic sequences of mitochondria and chloroplasts of essential brown algae(Phaeophyceae)in China  

作　　者：JIA Shangang WANG Xumin LI Tianyong QIAN Hao SUN Jing WANG Liang YU Jun REN Lufeng YIN Jinlong LIU Tao WU Shuangxiu 

机构地区：[1]CAS Key Laboratory of Genome Sciences and Information,Beijing Key Laboratory of Genome and Precision Medicine Technologies,Beijing Institute of Genomics,Chinese Academy of Sciences [2]Beijing Key Laboratory of Functional Genomics for Dao-di Herbs,Beijing Institute of Genomics,Chinese Academy of Sciences [3]College of Marine Life Science,Ocean University of China [4]University of Chinese Academy of Sciences

出　　处：《Acta Oceanologica Sinica》2014年第2期94-101,共8页海洋学报（英文版）

基　　金：The National Natural Science Foundation of China under contract Nos 31140070,31271397 and 41206116;the algal transcrip-tome sequencing was supported by 1KP Project(www.onekp.com)

摘　　要：The chloroplast and mitochondrion of brown algae （Class Phaeophyceae of Phylum Ochrophyta） may have originated from different endosymbiosis. In this study, we carried out phylogenomic analysis to distinguish their evolutionary lineages by using algal RNA-seq datasets of the 1 000 Plants （1KP） Project and publicly available complete genomes of mitochondria and chloroplasts of Kingdom Chromista. We have found that there is a split between Class Phaeophyceae of Phylum Ochrophyta and the others （Phylum Cryptophyta and Haptophyta） in Kingdom Chromista, and identified more diversity in chloroplast genes than mitochondrial ones in their phylogenetic trees. Taxonomy resolution for Class Phaeophyceae showed that it was divided into Laminariales-Ectocarpales clade and Fucales clade, and phylogenetic positions of Kjellmaniella crassi-folia, Hizikia fusifrome and Ishige okamurai were confirmed. Our analysis provided the basic phylogenetic relationships of Chromista algae, and demonstrated their potential ability to study endosymbiotic events.The chloroplast and mitochondrion of brown algae （Class Phaeophyceae of Phylum Ochrophyta） may have originated from different endosymbiosis. In this study, we carried out phylogenomic analysis to distinguish their evolutionary lineages by using algal RNA-seq datasets of the 1 000 Plants （1KP） Project and publicly available complete genomes of mitochondria and chloroplasts of Kingdom Chromista. We have found that there is a split between Class Phaeophyceae of Phylum Ochrophyta and the others （Phylum Cryptophyta and Haptophyta） in Kingdom Chromista, and identified more diversity in chloroplast genes than mitochondrial ones in their phylogenetic trees. Taxonomy resolution for Class Phaeophyceae showed that it was divided into Laminariales-Ectocarpales clade and Fucales clade, and phylogenetic positions of Kjellmaniella crassi-folia, Hizikia fusifrome and Ishige okamurai were confirmed. Our analysis provided the basic phylogenetic relationships of Chromista algae, and demonstrated their potential ability to study endosymbiotic events.

关 键 词：PHAEOPHYCEAE brown algae CHROMISTA phylogenetic trees MITOCHONDRION CHLOROPLAST 

分 类 号：Q949[生物学—植物学]