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Article

Characteristics and Comparative Analysis of Seven Complete Plastomes of Trichoglottis s.l. (Aeridinae, Orchidaceae)

by
Cheng-Yuan Zhou
1,†,
Meng-Yao Zeng
1,†,
Xuyong Gao
1,
Zhuang Zhao
1,
Ruyi Li
1,
Yuhan Wu
1,
Zhong-Jian Liu
1,2,
Diyang Zhang
1,2,* and
Ming-He Li
1,2,*
1
Key Laboratory of National Forestry and Grassland Administration for Orchid Conservation and Utilization at Landscape Architecture and Arts, Fujian Agriculture and Forestry University, Fuzhou 350002, China
2
Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources, Fujian Agriculture and Forestry University, Fuzhou 350002, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Int. J. Mol. Sci. 2023, 24(19), 14544; https://doi.org/10.3390/ijms241914544
Submission received: 17 August 2023 / Revised: 20 September 2023 / Accepted: 22 September 2023 / Published: 26 September 2023
(This article belongs to the Special Issue New Trends in Genomics and Metabolomics of Horticultural Plants at Fujian Agriculture and Forestry University)
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Abstract

Trichoglottis exhibits a range of rich variations in colors and shapes of flower and is a valuable ornamental orchid genus. The genus Trichoglottis has been expanded by the inclusion of Staurochilus, but this Trichoglottis sensu lato (s.l.) was recovered as a non-monophyletic genus based on molecular sequences from one or a few DNA regions. Here, we present phylogenomic data sets, incorporating complete plastome sequences from seven species (including five species sequenced in this study) of Trichoglottis s.l. (including two species formerly treated as Staurochilus), to compare plastome structure and to reconstruct the phylogenetic relationships of this genus. The seven plastomes possessed the typical quadripartite structure of angiosperms and ranged from 149,402 bp to 149,841 bp with a GC content of 36.6–36.7%. These plastomes contain 120 genes, which comprise 74 protein-coding genes, 38 tRNA genes, and 8 rRNA genes, all ndh genes were pseudogenized or lost. A total of 98 (T. philippinensis) to 134 (T. ionosma) SSRs and 33 (T. subviolacea) to 46 (T. ionosma) long repeats were detected. The consistent and robust phylogenetic relationships of Trichoglottis were established using a total of 25 plastid genomes from the Aeridinae subtribe. The genus Trichoglottis s.l. was strongly supported as a monophyletic group, and two species formerly treated as Staurochilus were revealed as successively basal lineages. In addition, five mutational hotspots (trnNGUU-rpl32, trnLUAA, trnSGCU-trnGUCC, rbcL-accD, and trnTGGU-psbD) were identified based on the ranking of PI values. Our research indicates that plastome data is a valuable source for molecular identification and evolutionary studies of Trichoglottis and its related genera.
Keywords: Trichoglottis; Staurochilus; Orchidaceae; plastid genome; phylogenetic analysis Trichoglottis; Staurochilus; Orchidaceae; plastid genome; phylogenetic analysis

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MDPI and ACS Style

Zhou, C.-Y.; Zeng, M.-Y.; Gao, X.; Zhao, Z.; Li, R.; Wu, Y.; Liu, Z.-J.; Zhang, D.; Li, M.-H. Characteristics and Comparative Analysis of Seven Complete Plastomes of Trichoglottis s.l. (Aeridinae, Orchidaceae). Int. J. Mol. Sci. 2023, 24, 14544. https://doi.org/10.3390/ijms241914544

AMA Style

Zhou C-Y, Zeng M-Y, Gao X, Zhao Z, Li R, Wu Y, Liu Z-J, Zhang D, Li M-H. Characteristics and Comparative Analysis of Seven Complete Plastomes of Trichoglottis s.l. (Aeridinae, Orchidaceae). International Journal of Molecular Sciences. 2023; 24(19):14544. https://doi.org/10.3390/ijms241914544

Chicago/Turabian Style

Zhou, Cheng-Yuan, Meng-Yao Zeng, Xuyong Gao, Zhuang Zhao, Ruyi Li, Yuhan Wu, Zhong-Jian Liu, Diyang Zhang, and Ming-He Li. 2023. "Characteristics and Comparative Analysis of Seven Complete Plastomes of Trichoglottis s.l. (Aeridinae, Orchidaceae)" International Journal of Molecular Sciences 24, no. 19: 14544. https://doi.org/10.3390/ijms241914544

APA Style

Zhou, C.-Y., Zeng, M.-Y., Gao, X., Zhao, Z., Li, R., Wu, Y., Liu, Z.-J., Zhang, D., & Li, M.-H. (2023). Characteristics and Comparative Analysis of Seven Complete Plastomes of Trichoglottis s.l. (Aeridinae, Orchidaceae). International Journal of Molecular Sciences, 24(19), 14544. https://doi.org/10.3390/ijms241914544

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