Rampant intraspecific variation of plastid genomes in Gentiana section Chondrophyllae

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(9)

Published: Sept. 1, 2024

Exploring the level of intraspecific diversity in taxa experienced radiation is helpful to understanding speciation and biodiversity assembly.

Language: Английский

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Comparative and evolutionary analysis of chloroplast genomes from five rare Styrax species

BMC Genomics, Journal Year: 2025, Volume and Issue: 26(1)

Published: May 7, 2025

Abstract Background Styrax , a vital raw material for shipbuilding, construction, perfumes, and drugs, represents the largest most diverse genus in Styracaceae. However, there is relative scarcity of research on particularly evolution genetics. Therefore, this study conducted comparative evolutionary analyses chloroplast genomes five rare species ( S. argentifolius buchananii chrysocarpus finlaysonianus rhytidocarpus ). Results The results indicated that, despite high levels conservation genome structure among these species, specific mutation hotspot regions exist, involving expansion contraction IR region. Additionally, evidence positive selection was detected eight genes atpB ccsA ndhD petA rbcL rpoC1 ycf1 ycf2 ), which may be associated with adaptive response to environmental changes. Phylogenetic analysis revealed conflicts between trees constructed based coding sequences complete several were similar previous phylogenetic studies. Conclusion This underscores importance increasing sample sizes enhance accuracy provides new perspective understanding species. These findings are not only important sustainable use but also provide valuable insights plant ecology within genus.

Language: Английский

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Plastome evolution and phylogenomic insights into the evolution of the African submerged endemic genus Lagarosiphon (Hydrocharitaceae)

Aquatic Botany, Journal Year: 2025, Volume and Issue: unknown, P. 103901 - 103901

Published: May 1, 2025

Language: Английский

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The dynamic history of plastome structure across aquatic subclass Alismatidae

BMC Plant Biology, Journal Year: 2023, Volume and Issue: 23(1)

Published: March 4, 2023

The rapidly increasing availability of complete plastomes has revealed more structural complexity in this genome under different taxonomic levels than expected, and provides important evidence for understanding the evolutionary history angiosperms. To explore dynamic plastome structure across subclass Alismatidae, we sampled compared 38 plastomes, including 17 newly assembled, representing all 12 recognized families Alismatidae.We found that size, structure, repeat elements, gene content were highly variable studied species. Phylogenomic relationships among reconstructed six main patterns variation revealed. Among these, inversion from rbcL to trnV-UAC (Type I) characterized a monophyletic lineage families, but independently occurred also Caldesia grandis. Three independent ndh loss events uncovered Alismatidae. In addition, detected positive correlation between number elements size IR Alismatidae.In our study, complex likely contributed Also, was related boundary changes adaptation aquatic habits. Based on existing divergence time estimation, Type I may have during Cretaceous-Paleogene response extreme paleoclimate changes. Overall, findings will not only allow exploring Alismatidae plastome, provide an opportunity test if similar environmental adaptations result convergent restructuring plastomes.

Language: Английский

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Strong plastid degradation is consistent within section Chondrophyllae, the most speciose lineage of Gentiana

Ecology and Evolution, Journal Year: 2022, Volume and Issue: 12(8)

Published: Aug. 1, 2022

Abstract Recovering phylogenetic relationships in lineages experiencing intense diversification has always been a persistent challenge evolutionary studies, including Gentiana section Chondrophyllae sensu lato (s.l.). Indeed, this subcosmopolitan taxon encompasses more than 180 mostly annual species distributed around the world. We sequenced and assembled 22 new plastomes representing 21 s.l. In addition to previously released plastome data, our study includes all main within section. reconstructed their based on protein‐coding genes recombinant DNA (rDNA) cistron sequences, then investigated structural evolution as well divergence time. Despite an admittedly humble cover overall, we recovered well‐supported tree found significant discordance between taxonomic treatments. Our results show that G. capitata leucomelaena diverged early section, which is further divided into two clades. The time estimation showed evolved second half of Oligocene. had smallest average size (128 KB) tribe Gentianeae (Gentianaceae), with frequent gene sequence losses such ndh complex its flanking regions. addition, detected both expansion contraction inverted repeat (IR) suggests degradation parallels group, illustrates strong treatments, now need be carefully revised.

Language: Английский

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Cryptic diversity and rampant hybridization in annual gentians on the Qinghai-Tibet Plateau revealed by population genomic analysis

Plant Diversity, Journal Year: 2023, Volume and Issue: 46(2), P. 194 - 205

Published: Oct. 28, 2023

Understanding the evolutionary and ecological processes involved in population differentiation speciation provides critical insights into biodiversity formation. In this study, we employed 29,865 single nucleotide polymorphisms (SNPs) complete plastomes to examine genomic divergence hybridization Gentiana aristata, which is endemic Qinghai-Tibet Plateau (QTP) region. Genetic clustering revealed that G. aristata characterized by geographic genetic structures with five clusters (West, East, Central, South North). The West cluster has a specific morphological character (i.e., blue corolla) higher values of FST compared remaining clusters, likely result geological barrier formed Yangtze River. diverged from other Early Pliocene; these one another Quaternary. Phylogenetic reconstructions based on SNPs plastid data substantial cyto-nuclear conflicts. D-statistics demonstrated rampant between Central North cluster, along Bayankela Mountains, form cluster. Species distribution modeling range expanded since Last Interglacial period. Our findings provide evidence cryptic diversity identified barrier. These suggest barriers climatic fluctuations have an important role triggering diversification as well hybridization, indicating are essential factors formation within QTP

Language: Английский

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Gentiana mopanshanensis (Gentianaceae), a new species from Yunnan, southwest China

PhytoKeys, Journal Year: 2024, Volume and Issue: 239, P. 215 - 228

Published: March 20, 2024

Gentiana mopanshanensis , a new species of the family Gentianaceae is here described and illustrated. This presently known only from Mopanshan Mountain, Yunnan Province, southwest China. Phylogenetic analysis based on ITS sequence data has shown that this member series Fimbriatae section Chondrophyllae. Morphologically, it mostly resembles G. mairei panthaica but differs clearly latter two in shape size leaves, characters corolla throat plicae.

Language: Английский

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Characteristics of the complete chloroplast genome of Swertia divaricata Harry Sm. (Gentianaceae) and its phylogenetic inference

Mitochondrial DNA Part B, Journal Year: 2023, Volume and Issue: 8(10), P. 1132 - 1136

Published: Oct. 3, 2023

Swertia divaricata Harry Sm., 1965, (Gentianaceae) is a perennial herb endemic to Northwest Yunnan, China, belonging the species-rich genus Swertia. It possesses unique morphological features but its systematic position remains uncertain. To determine phylogenetic placement, complete plastid genome of S. was assembled utilizing high-throughput sequencing data. The circular, spanning 152,073 bp, and comprises large single-copy (LSC) region 82,470 small (SSC) 18,153 two inverted repeats (IR) regions, each 25,725 bp. A total 130 genes were annotated, including 85 protein-coding genes, 37 tRNA eight rRNA genes. plastome exhibits structure gene composition highly similar those other plastomes. Phylogenetic analysis indicated that closely related erythrosticta, sister subclade comprising species from sections Apterae. sequence described herein constitutes valuable contribution evolutionary research on

Language: Английский

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Hybridization and divergent climatic preferences drive divergence of two allopatric Gentiana species on the Qinghai–Tibet Plateau

Annals of Botany, Journal Year: 2023, Volume and Issue: 132(7), P. 1271 - 1288

Published: Nov. 14, 2023

Exploring how species diverge is vital for understanding the drivers of speciation. Factors such as geographical separation and ecological selection, hybridization, polyploidization shifts in mating system are all major mechanisms plant speciation, but their contributions to divergence rarely well understood. Here we test these two species, Gentiana lhassica G. hoae, with goal recent allopatric on Qinghai-Tibet Plateau (QTP).

Language: Английский

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