Complete chloroplast genome of Nyctocalos pinnatum: chloroplast features and phylogenetic relationships within Bignoniaceae

Huan Fan; Jinyue Li; Sven Landrein

doi:10.1080/23802359.2022.2081522

Complete chloroplast genome of Nyctocalos pinnatum: chloroplast features and phylogenetic relationships within Bignoniaceae

Mitochondrial DNA B Resour. 2022 Jun 14;7(6):1035-1037. doi: 10.1080/23802359.2022.2081522. eCollection 2022.

Authors

Huan Fan^{1

2}, Jinyue Li^{1

3}, Sven Landrein⁴

Affiliations

¹ Centre for Integrative Conservation, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China.
² Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, China.
³ University of Chinese Academy Sciences, Beijing, China.
⁴ Center for Gardening and Horticulture, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, China.

Abstract

Nyctocalos is a genus of flowering lianas belonging to the family Bignoniaceae, and occurring from South-Central China to Malesia. In this study, we assembled the first complete chloroplast genome of N. pinnatum. The total length of the chloroplast genome is 159591 bp, with a GC content of 38.04%, which includes a pair of inverted repeats of 30,480 bp, a small single-copy region of 12,774 bp and a large single-copy region of 85,857 bp. The chloroplast genome contains 135 genes, consisting of 89 protein-coding genes, 38 transfer RNAs, and 8 ribosomal RNAs. We constructed a phylogenomic tree with representative chloroplast genomes from Bignoniaceae. N. pinnatum is revealed to be sister to Oroxylum in the tribe Oroxyleae, with a high bootstrap support. This is the first chloroplast genome assembled in Nyctocalos, and it provides essential information for further ecology and evolutionary studies in this genus and Bignoniaceae.

Keywords: Bignoniaceae; Nyctocalos pinnatum; chloroplast genome; phylogeny.

Grants and funding

This work was supported by the Core Botanical Gardens [Grant No. Y9ZK011B08]. HF was supported by the China Postdoctoral Fund [2019M663597] and International Postdoctoral Exchange Fellowship Program.