Bougainvillea glabra is one of the most popular ornamental and landscaping plants planted in tropical and subtropical regions. The brightly colored bracts, long florescence and strong stress resistance make B. glabra perfect ornamental horticulture plant. Bougainvillea plants have been frequently hybridized, resulting in more than 400 varieties. To investigate the chloroplast genome will help us to understand the biological diversity and stress resistance of Bougainvillea plants better. Here, we report the complete chloroplast genome of B. glabra, which is 154,542 bp in length, including a large single copy (LSC) region of 85,695 bp and a small single copy (SSC) region of 18,077 bp, separated by a pair of identical inverted repeat regions (IRs) of 25,385 bp each. A total of 128 genes were identified, including 83 protein-coding genes, 37 tRNA genes, and 8 rRNA genes. Phylogenetic analysis based on 12 chloroplast genomes showed that B. glabra, accompanied with its sister species B. spectabilis, formed a base clade in Nyctaginaceae which was close to Pisonia aculeata. This study will be helpful for better understanding of the genetic diversity and stress resistance of Bougainvillea plants.
Keywords: Bougainvillea glabra; biological diversity; chloroplast genome; phylogeny.
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