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The complete chloroplast genome of a commercially exploited ornamental plant, Bougainvillea glabra (Caryophyllales: Nyctaginaceae).

ABSTRACT: Bougainvillea glabra is an ornamental plant that is domesticated in many tropical and sub-tropical countries. The focus on its breeding programmes has overshadowed genetic studies of this important species. In this study, we reported on the complete chloroplast (cp) genome of B. glabra. The cp genome is 154,763?bp in size, comprised of a large single copy (LSC) region of 85,921?bp, a small single copy (SSC) region of 18,018?bp, and a pair of inverted repeat (IR) regions of 25,412?bp each. A total of 131 genes were predicted, including 37 tRNA, 8 rRNA, and 86 protein-coding genes. Phylogenetic analysis revealed that B. glabra is placed under Nyctaginaceae and sister to B. spectabilis under a strong bootstrap support.

SUBMITTER: Ni J

PROVIDER: S-EPMC7707241 | biostudies-literature | 2019 Oct

REPOSITORIES: biostudies-literature

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The complete chloroplast genome of a commercially exploited ornamental plant, Bougainvillea glabra (Caryophyllales: Nyctaginaceae).

Ni Jianzhong J Lee Shiou Yih SY Hu Xing X Wang Wei W Zhang Jifang J Ruan Lin L Dai Seping S Liu Guofeng G

Mitochondrial DNA. Part B, Resources 20191007 2

Bougainvillea glabra is an ornamental plant that is domesticated in many tropical and sub-tropical countries. The focus on its breeding programmes has overshadowed genetic studies of this important species. In this study, we reported on the complete chloroplast (cp) genome of B. glabra. The cp genome is 154,763 bp in size, comprised of a large single copy (LSC) region of 85,921 bp, a small single copy (SSC) region of 18,018 bp, and a pair of inverted repeat (IR) regions of 25,412 b ...[more]

PMID: 33366007

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Project description:Bougainvillea (Nyctaginaceae) is a popular ornamental plant group primarily grown for its striking colorful bracts. However, despite its established horticultural value, limited genomic resources and molecular studies have been reported for this genus. Thus, to address this existing gap, complete chloroplast genomes of four species (Bougainvillea glabra, Bougainvillea peruviana, Bougainvillea pachyphylla, Bougainvillea praecox) and one Bougainvillea cultivar were sequenced and characterized. The Bougainvillea cp genomes range from 153,966 bp to 154,541 bp in length, comprising a large single-copy region (85,159 bp-85,708 bp) and a small single-copy region (18,014 bp-18,078 bp) separated by a pair of inverted repeats (25,377-25,427 bp). All sequenced plastomes have 131 annotated genes, including 86 protein-coding, eight rRNA, and 37 tRNA genes. These five newly sequenced Bougainvillea cp genomes were compared to the Bougainvillea spectabilis cp genome deposited in GeBank. The results showed that all cp genomes have highly similar structures, contents, and organization. They all exhibit quadripartite structures and all have the same numbers of genes and introns. Codon usage, RNA editing sites, and repeat analyses also revealed highly similar results for the six cp genomes. The amino acid leucine has the highest proportion and almost all favored synonymous codons have either an A or U ending. Likewise, out of the 42 predicted RNA sites, most conversions were from serine (S) to leucine (L). The majority of the simple sequence repeats detected were A/T mononucleotides, making the cp genomes A/T-rich. The contractions and expansions of the IR boundaries were very minimal as well, hence contributing very little to the differences in genome size. In addition, sequence variation analyses showed that Bougainvillea cp genomes share nearly identical genomic profiles though several potential barcodes, such as ycf1, ndhF, and rpoA were identified. Higher variation was observed in both B. peruviana and B. pachyphylla cp sequences based on SNPs and indels analysis. Phylogenetic reconstructions further showed that these two species appear to be the basal taxa of Bougainvillea. The rarely cultivated and wild species of Bougainvillea (B. pachyphylla, B. peruviana, B. praecox) diverged earlier than the commonly cultivated species and cultivar (B. spectabilis, B. glabra, B. cv.). Overall, the results of this study provide additional genetic resources that can aid in further phylogenetic and evolutionary studies in Bougainvillea. Moreover, genetic information from this study is potentially useful in identifying Bougainvillea species and cultivars, which is essential for both taxonomic and plant breeding studies.

Dataset Information

The complete chloroplast genome of a commercially exploited ornamental plant, Bougainvillea glabra (Caryophyllales: Nyctaginaceae).

Publications

The complete chloroplast genome of a commercially exploited ornamental plant, <i>Bougainvillea glabra</i> (Caryophyllales: Nyctaginaceae).

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