Multi‐gene phylogeny of the genus <i>Lobaria</i>: Evidence of species‐pair and allopatric cryptic speciation in East Asia

Cornejo, Carolina; Scheidegger, Christoph

doi:10.3732/ajb.1500207

Cited by 27 publications

(17 citation statements)

References 91 publications

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“…All molecular clock analyses returned a topology that was fully consistent with the previous multilocus phylogeny of Lobaria (Cornejo & Scheidegger 2015). We first tested nrITS and RPB2 mutation rate priors separately and then in a combined approach.…”

Section: Resultssupporting

confidence: 76%

“…Along with the mutation rate for the nrITS (2•4 × 10 −9 s s −1 y −1 ), we obtained rates for RPB2 (0•882 × 10 −9 s s −1 y −1 ) and EF-1α (1•09 × 10 −9 s s −1 y −1 ). Most bifurcations are maximally supported by posterior probabilities (PP) = 0•98, except for four that were also poorly supported in the prior analysis (Cornejo & Scheidegger 2015) in which relationships between species of Lobaria were discussed. Consequently, these bifurcations are not considered for the age estimate.…”

Section: Molecular Clock Ratementioning

confidence: 94%

“…For the present investigation we used the alignment from a previous study on evolutionary relationships within Lobaria (Cornejo & Scheidegger 2015), which is available in TreeBase (http://treebase.org) under the study identification number S18155. Three molecular markers (EF-1α, nrITS, RPB2) and 50 specimens from all major Lobaria clades were assembled and four outgroup specimens of Lobarina scrobiculata (Scop.)…”

Section: Methodsmentioning

confidence: 99%

“…Lobarina scrobiculata used as outgroup. where the fossil impression was found. Furthermore, Cornejo & Scheidegger (2015) have shown that L. anomala and L. retigera belong to a cyanobacterial lineage whereas L. pulmonaria belongs to a green-algal lineage, with both lineages originating from a common ancestral Lobaria species. Thus, another possibility is that the fossil impression represents an ancestral taxon.…”

Section: Introductionmentioning

confidence: 99%

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Estimating the timescale of Lobaria diversification

Cornejo¹,

Scheidegger²

2018

The Lichenologist

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Using an ITS mutation rate as calibration reference, a three-locus timetree was generated for the genus Lobaria and its most important clades. The timetree resolved most clades with strong support and gave an estimate of the diversification time for Lobaria during the early Oligocene. A fossil impression from a 12–24 million-year-old Miocene deposit is hypothesized here to belong to an ancestral Lobaria species. Additionally, the age estimate indicates that the paleoclimate and the closing or opening of the Bering Strait played a major role in shaping the current distribution of most Lobaria species. It is hypothesized that the Bering land bridge acted as a major highway during warm-temperate climate periods, but as a barrier during Arctic climate times.

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Section: Resultssupporting

confidence: 76%

Section: Molecular Clock Ratementioning

confidence: 94%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Estimating the timescale of Lobaria diversification

Cornejo¹,

Scheidegger²

2018

The Lichenologist

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“…Magn.) Lendemer vs. P. albocaerulescens (Wulfen) Hertel & Knoph: Lendemer & Harris 2014; various groups within the Lobaria meridionalis clade: Cornejo & Scheidegger 2015; in contrast see Buschbom & Mueller 2005 and Tehler et al . 2013).…”

Section: Introductionmentioning

confidence: 99%

Is asexual reproduction an evolutionary dead end in lichens?

Tripp

2016

The Lichenologist

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Classical hypotheses in lichenology predict pairs of species in which sexual lineages are ancestral and long-lived evolutionarily and that these give rise to derived, evolutionarily transient asexual lineages. Extensive phylogenetic information generated over the last 20 years regarding relationships within and among various groups of lichens makes possible an investigation of polarity and lability in reproductive mode across diverse clades. To test the long-held hypothesis of asexual reproduction as an evolutionary dead end in lichens, existing phylogenetic data from 23 studies were utilized to reconstruct gains and losses of sexual and asexual reproduction in a model-based statistical framework. Summed across all studies, between 26–44 origins of asexual reproduction from sexual ancestors (forward transitions) and 14–25 origins of sexual reproduction from asexual ancestors (reverse transitions) were identified. However, the higher number of gains of asexual reproduction was concentrated in a relatively low number of clades (e.g. Dirina). The greater number of forward compared to reverse transitions is consistent with dogma in both lichenology and evolutionary biology, but nonetheless this study documents numerous reverse transitions, suggesting that asexual lineages represent a source for evolutionary innovation.

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Phylogeographic analyses of an epiphytic foliose lichen show multiple dispersal events westward from the Hengduan Mountains of Yunnan into the Himalayas

Yang

Werth

Wang

et al. 2022

Ecology and Evolution

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Lobaria pindarensis is an endemic species of the Himalayas and the Hengduan Mountains. Little information is available on the phylogeography genetics and colonization history of this species or how its distribution patterns changed in response to the orographic history of the Himalayas and Hengduan Mountains. Based on samples covering a major part of the species' distribution range, we used 443 newly generated sequences of nine loci for molecular coalescent analyses in order to reconstruct the evolutionary history of L. pindarensis, and to reconstruct the species' ancestral phylogeographic distributions using Bayesian binary MCMC analyses. The results suggest that current populations originated from the Yunnan region of the Hengduan Mountains in the middle Pliocene, and that the Himalayas of Bhutan were colonized by a lineage that diverged from Yunnan ca. 2.72 Ma. The analysis additionally indicates that the Nepal and Xizang areas of the Himalayas were colonized from Yunnan as well, and that there was later a second dispersal event from Yunnan to Bhutan. We conclude that the change in climate and habitat related to the continuous uplift of the Himalayas and the Hengduan Mountains in the late Pliocene and middle Pleistocene influenced the geographic distribution pattern of L. pindarensis.

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Multi‐gene phylogeny of the genus Lobaria: Evidence of species‐pair and allopatric cryptic speciation in East Asia

Cited by 27 publications

References 91 publications

Estimating the timescale of Lobaria diversification

Estimating the timescale of Lobaria diversification

Is asexual reproduction an evolutionary dead end in lichens?

Phylogeographic analyses of an epiphytic foliose lichen show multiple dispersal events westward from the Hengduan Mountains of Yunnan into the Himalayas

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