Insights into cryptic speciation of quillworts in China

Gu, Yu‐Cheng; Shu, Jiang-Ping; Lu, Yujun; Shen, Hui; Shao, Wen; Zhou, Yan; Qiang, Sun; Chen, Jianbing; Liu, Baodong; Yan, Yue‐Hong

doi:10.1016/j.pld.2022.11.003

Cited by 3 publications

(3 citation statements)

References 134 publications

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“…Up to now, 12 species have been published in China (Gu et al. 2023 ; Liu et al. 2024 ), we believe that the chloroplast genome of these species have been assembled and annotated but not been published yet.…”

Section: Discussionmentioning

confidence: 99%

The complete chloroplast genome sequence of Isoetes baodongii (Isoetaceae)

Guo,

Zhai,

2024

Mitochondrial DNA Part B

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Isoetes baodongii is a diploid species of Isoetaceae distributed in low altitude area, its megaspore ornamentation is similar to tetraploid species I. sinensis . We collected leaf material of I. baodongii and sequenced it for low depth whole genome sequence, then, a complete chloroplast genome of I. baodongii was assembled and annotated. This chloroplast genome has a circular structure of 145,494 bp in length with a GC content of 38.0%, comprising a large single copy (LSC) region of 91,860 bp, a pair of inverted repeat (IR) regions of 13,207 bp each, and a small single copy (SSC) region of 27,220 bp. 136 genes were annotated, including 84 protein-coding genes, 38 tRNA genes, and 8 rRNA genes. A maximum likelihood phylogeny tree was reconstructed after the sequences alignment, the result showed that I. baodongii formed a sister clade to the one clustered by I. sinensis , I. taiwanensis and I. orientalis . Although the chloroplast genome structure of I. baodongii is extremely similar to other species distributed in China, a well-supported phylogenetic relationship was reconstructed here, these results may provide new messages for further studies on phylogeny and evolution of vascular plant on the earth.

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Section: Discussionmentioning

confidence: 99%

The complete chloroplast genome sequence of Isoetes baodongii (Isoetaceae)

Guo,

Zhai,

2024

Mitochondrial DNA Part B

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“…In recent years, an increasing number of cryptic species that were hidden in plain sight have been unveiled, driven in part by the rise of DNA barcoding ( Ni et al 2012 ; Tyagi et al 2019 ; Labe et al 2022 ; Takenaka et al 2023 ). Notable groups that include cryptic species encompass organisms like Isoetes Linnaeus (1753 : 1100; Gu et al (2022) ), Ceratopteris Brongn. (1822: 186; Yu et al (2021) ) and jellyfish ( Moura et al 2023 ).…”

Section: Discussionmentioning

confidence: 99%

“…Relying on macroscopic morphological classification in the past has frequently resulted in treating groups with subtle morphological differences as a single species due to subjective interpretations of morphology ( Gu et al 2022 ). For instance, Didymochlaena Desvaux (1811 : 303) was historically considered to contain only one (PPG I 2016) or six species ( Shang et al 2020 ), based on morphological characters, while a recent study utilising morphological and molecular variation has identified 22 species within the genus ( Shang et al 2023 ), marking a threefold increase in the previously known number of species.…”

Section: Discussionmentioning

confidence: 99%

Angiopteris nodosipetiolata (Marattiaceae), a new fern species from Yunnan, China

Wang,

Yang,

Zhang

et al. 2024

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Angiopteris nodosipetiolata Ting Wang tris, H.F.Chen & Y.H.Yan, a new fern of Marattiaceae, is described and illustrated. Morphologically, A. nodosipetiolata is similar to A. chingii with more than one naked pulvinus on the stipe and numerous jointed hairs on the undersides of the mature pinnae. However, the pinnae of A. nodosipetiolata are lanceolate and can reach up to 4–6 pairs, whereas they are elliptic and occur in 2–3 pairs in A. chingii. Phylogenetic and genetic distance analysis, based on the plastid genomes, also indicates that A. nodosipetiolata is not closely related to A. chingii. Currently, there are ca. 500 mature individuals in Gulinqing Nature Reserve and we suggest A. nodosipetiolata should be categorised as an Endangered (EN) species according to the criteria of IUCN.

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Plastome phylogenomics and morphological traits analyses provide new insights into the phylogenetic position, species delimitation and speciation of Triplostegia (Caprifoliaceae)

Fu,

Mo,

Xiang

et al. 2023

BMC Plant Biol

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Background The genus Triplostegia contains two recognized species, T. glandulifera and T. grandiflora, but its phylogenetic position and species delimitation remain controversial. In this study, we assembled plastid genomes and nuclear ribosomal DNA (nrDNA) cistrons sampled from 22 wild Triplostegia individuals, each from a separate population, and examined these with 11 recently published Triplostegia plastomes. Morphological traits were measured from herbarium specimens and wild material, and ecological niche models were constructed. Results Triplostegia is a monophyletic genus within the subfamily Dipsacoideae comprising three monophyletic species, T. glandulifera, T. grandiflora, and an unrecognized species Triplostegia sp. A, which occupies much higher altitude than the other two. The new species had previously been misidentified as T. glandulifera, but differs in taproot, leaf, and other characters. Triplotegia is an old genus, with stem age 39.96 Ma, and within it T. glandulifera diverged 7.94 Ma. Triplostegia grandiflora and sp. A diverged 1.05 Ma, perhaps in response to Quaternary climate fluctuations. Niche overlap between Triplostegia species was positively correlated with their phylogenetic relatedness. Conclusions Our results provide new insights into the species delimitation of Triplostegia, and indicate that a taxonomic revision of Triplostegia is needed. We also identified that either rpoB-trnC or ycf1 could serve as a DNA barcode for Triplostegia.

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Insights into cryptic speciation of quillworts in China

Cited by 3 publications

References 134 publications

The complete chloroplast genome sequence of Isoetes baodongii (Isoetaceae)

The complete chloroplast genome sequence of Isoetes baodongii (Isoetaceae)

Angiopteris nodosipetiolata (Marattiaceae), a new fern species from Yunnan, China

Plastome phylogenomics and morphological traits analyses provide new insights into the phylogenetic position, species delimitation and speciation of Triplostegia (Caprifoliaceae)

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