Phylogeny and reclassification of Aconitum subgenus Lycoctonum (Ranunculaceae)

Yu, Hong; Luo, Yan; Gao, Qi; Ren, Chen; Yuan, Qiong; Yang, Qin‐Er

doi:10.1371/journal.pone.0171038

Cited by 22 publications

(19 citation statements)

References 37 publications

(52 reference statements)

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“…In addition, such small sizes also resulted in our sampling limitation for each species, which could affect our conclusions. However, other endemic species to these island‐like mountains (Wu & Wu, ) might have larger population sizes than these sampled Brassicaceae species, for example, the mountaintop Aconitum L. species in the Hengduan Mountains (Luo et al, ; Hong et al, ). It remains unknown whether these species originated and population sizes oscillated with similar patterns to those found here.…”

Section: Discussionmentioning

confidence: 99%

Genomic insight into “sky island” species diversification in a mountainous biodiversity hotspot

Zhang

Hao

Guo

et al. 2019

J of Sytematics Evolution

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“Sky island” species diversification contributes greatly to mountainous biodiversity. However, the underlying genomic divergence and the inferred drivers remain largely unknown. In this study, we examined the diversification history of five diploid species with three exclusively endemic to the sky islands (mountains) of the Himalaya–Hengduan Mountains biodiversity hotspot. All of them together comprise a clade of the genus Eutrema (Brassicaceae). We resequenced genomes of multiple individuals of the found populations for each species. We recovered the inconsistent phylogenetic relationships between plastome and nuclear‐genome trees for one species. Based on nuclear population genomic data, we detected high genetic divergence between five species with limited gene flow. Four species seemed to diverge mainly through geographical isolation, whereas one arose through hybrid origin. The origins of the sampled five species were dated to within the late Miocene when mountains were uplifted and climates oscillated. All species decreased their population sizes since the inferred origin of each species initially, but only two of them expanded after the Last Glacial Maximum. Together, these findings suggest that geographic isolation plays an important role in driving the sky island species diversification of the sampled species in addition to the occasional gene flow that might have led to the hybrid origin of some sky island species, similar to the species diversification of sea islands.

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Section: Discussionmentioning

confidence: 99%

Genomic insight into “sky island” species diversification in a mountainous biodiversity hotspot

Zhang

Hao

Guo

et al. 2019

J of Sytematics Evolution

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“…Almost all Aconitum species studied so far have an interesting bimodal karyotype ( x = 8) with two large (metacentric and submetacentric) and six small (usually submetacentric) chromosomes (Yuan and Yang 2006 , Hong et al 2017 ). Most taxa are diploid (2 n = 16) or tetraploid (2 n = 32), but triploid, pentaploid, hexaploid, and octoploid plants have been also detected (Simon et al 2001 ).…”

Section: Introductionmentioning

confidence: 99%

FISH-aimed karyotype analysis in Aconitum subgen. Aconitum reveals excessive rDNA sites in tetraploid taxa

et al. 2018

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The location of 5S and 35S rDNA sequences in chromosomes of four Aconitum subsp. Aconitum species was analyzed after fluorescence in situ hybridization (FISH). Both in diploids (2n = 2x = 16; Aconitum variegatum, A. degenii) and tetraploids (2n = 4× = 32; A. firmum, A. plicatum), rDNA repeats were localized exclusively on the shorter arms of chromosomes, in subterminal or pericentromeric sites. All analyzed species showed similar basal genome size (Cx = 5.31–5.71 pg). The most striking features of tetraploid karyotypes were the conservation of diploid rDNA loci and emergence of many additional 5S rDNA clusters. Chromosomal distribution of excessive ribosomal sites suggests their role in the secondary diploidization of tetraploid karyotypes.

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“…Lycoctonum by Hong et al (2017), yet phylogenetic information at the genomics level has been PeerJ reviewing PDF | (2017:06:18521:3:0:NEW 19 Oct 2017)…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "A comparison of chloroplast genome sequences in Aconitum (Ranunculaceae): a traditional herbal medicinal genus (v0.1)"

Chen¹

2017

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The herbal medicinal genus Aconitum L., belonging to the Ranunculaceae family, represents the earliest diverging lineage within the eudicots. It currently comprises of two subgenera, A. subgenus Lycoctonum and A. subg. Aconitum. The complete chloroplast (cp) genome sequences were characterized in three species: A. angustius, A. finetianum, and A. sinomontanum in subg. Lycoctonum and compared to other Aconitum species to clarify their phylogenetic relationship and provide molecular information for utilization of Aconitum species particularly in Eastern Asia. The length of the chloroplast genome sequences were 156,109 bp in A. angustius, 155,625 bp in A. finetianum and 157,215 bp in A. sinomontanum, with each species possessing 126 genes with 84 protein coding genes (PCGs). While genomic rearrangements were absent, structural variation was detected in the LSC/IR/SSC boundaries. Five pseudogenes were identified, among which Ψrps19 and Ψycf1 were in the LSC/IR/SSC boundaries, Ψrps16 and ΨinfA in the LSC region, and Ψycf15 in the IRb region. The nucleotide variability (Pi) of Aconitum was estimated to be 0.00549, with comparably higher variations in the LSC and SSC than the IR regions. Eight intergenic regions were revealed to be highly variable and a total of 58-62 simple sequence repeats (SSRs) were detected in all three species. More than 80% of SSRs were present in the LSC region. Altogether, 64.41% and 46.81% of SSRs are mononucleotides in subg. Lycoctonum and subg. Aconitum, respectively, while a higher percentage of di-, tri-, tetra-, and penta-SSRs were present in subg. Aconitum. Most species of subg. Aconitum in Eastern Asia were first used for phylogenetic analyses. The availability of the complete cp genome sequences of these species in subg. Lycoctonum will benefit future phylogenetic analyses and aid in germplasm utilization in Aconitum species.

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Phylogeny and reclassification of Aconitum subgenus Lycoctonum (Ranunculaceae)

Cited by 22 publications

References 37 publications

Genomic insight into “sky island” species diversification in a mountainous biodiversity hotspot

Genomic insight into “sky island” species diversification in a mountainous biodiversity hotspot

FISH-aimed karyotype analysis in Aconitum subgen. Aconitum reveals excessive rDNA sites in tetraploid taxa

Peer Review #1 of "A comparison of chloroplast genome sequences in Aconitum (Ranunculaceae): a traditional herbal medicinal genus (v0.1)"

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