Chinese Bulletin of Botany ›› 2019, Vol. 54 ›› Issue (4): 441-454.DOI: 10.11983/CBB18191

• RESEARCH ARTICLE • Previous Articles     Next Articles

Chloroplast Genome Structural Characteristics and Phylogenetic Relationships of Oleaceae

Yuemei Zhao1,Zhenyan Yang2,Yongping Zhao1,Xiaoling Li1,Zhixin Zhao1,Guifang Zhao3,*()   

  1. 1 College of Biopharmaceutical and Food Engineering, Shangluo University, Shangluo 726000, China
    2 Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
    3 Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi’an 710069, China
  • Received:2018-09-06 Accepted:2019-04-23 Online:2019-07-10 Published:2020-01-08
  • Contact: Guifang Zhao

Abstract: In this study, the chloroplast genomes from 19 species (11 genera) in Oleaceae were compared to reveal the general characteristics and structural variations. The chloroplast genome sizes in Oleaceae were 154-165 kb, and the differences were mainly caused by the length of large single-copy regions. The chloroplast genome sizes of 3 species from the genus Jasminum differed greatly from that for other species; in addition, the introns from the clpP and accD genes were lost in Jasminum. Synteny analyses showed several gene rearrangements in 3 Jasminum species that were probably caused by inversions. The boundary genes between IRb/small single copy (SSC) and SSC/IRa regions in 3 Jasminum species differed from others. Repeat sequences and simple sequence repeat detection demonstrated that Jasminum had significant differences in repeat number and repeat length as compared with other genera. On the basis of shared protein-coding genes among 19 species, Abeliophyllum distichum and Forsythia suspensa were the early-diverging clades in Oleaceae.

Key words: Oleaceae, chloroplast genomes, structural characteristics, phylogeny