The complete chloroplast genome of Magnolia delavayi, a threatened species endemic to Southwest China

Abstract

Magnolia delavayi, a threatened plant endemic to Southwest China, is of great importance for landscaping because of its lotus-like creamy flowers. In this study, the complete chloroplast (cp) genome of M. delavayi was assembled based on the Illumina sequences. The cp genome of M. delavayi was 159,470 bp in length and contained a pair of inverted regions (IR, 26,409 bp) which were separated by the small single copy (SSC, 18,760 bp) and the large single copy (LSC, 87,892 bp) regions. It encoded 132 genes including 86 protein-coding genes, 37 tRNA genes, and eight rRNA ribosomal genes. The overall AT content of M. delavayi cp genome is 60.7%. The maximum likelihood phylogenetic analysis revealed that the species of M. delavayi was isolated first among the genus Magnolia. This result will be helpful for the conservation and phylogeny programs of the genus Magnolia.

Keywords: Illumina sequencing; Magnolia delavayi; chloroplast genome; phylogenetic analysis.

Figure 1.

Maximum-likelihood phylogenetic tree for Magnolia delavayi based on 30 complete chloroplast genomes. The number on each node indicates bootstrap support value.