Quaternary range dynamics and polyploid evolution in an arid brushland plant species (Melampodium cinereum, Asteraceae)

Rebernig, Carolin A.; Weiss‐Schneeweiss, Hanna; Schneeweiss, Gerald M.; Schönswetter, Peter; Obermayer, Renate; Villaseñor, José Luís; Stuessy, Tod F.

doi:10.1016/j.ympev.2009.10.010

Cited by 28 publications

(53 citation statements)

References 108 publications

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“…Sosa et al. , 2009; Rebernig et al. , 2010), although these tend to be species that currently occupy the same areas, rather than those which now exhibit a more northerly distribution.…”

Section: Discussionmentioning

confidence: 99%

Phylogeographic analysis of North American populations of the parasitic herbaceous plant Monotropa hypopitys L. reveals a complex history of range expansion from multiple late glacial refugia

Beatty

Provan²

2011

Journal of Biogeography

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Aim We carried out a phylogeographic study across the range of the herbaceous plant species Monotropa hypopitys L. in North America to determine whether its current disjunct distribution is due to recolonization from separate eastern and western refugia after the Last Glacial Maximum (LGM). Location North America: Pacific Northwest and north-eastern USA/south-eastern Canada. Methods Palaeodistribution modelling was carried out to determine suitable climatic regions for M. hypopitys at the LGM. We analysed between 155 and 176 individuals from 39 locations spanning the species' entire range in North America. Sequence data were obtained for the chloroplast rps2 gene (n = 168) and for the nuclear ITS region (n = 158). Individuals were also genotyped for eight microsatellite loci (n = 176). Interpolation of diversity values was used to visualize the range-wide distribution of genetic diversity for each of the three marker classes. Minimum spanning networks were constructed showing the relationships between the rps2 and ITS haplotypes, and the geographical distributions of these haplotypes were plotted. The numbers of genetic clusters based on the microsatellite data were estimated using Bayesian clustering approaches. Results The palaeodistribution modelling indicated suitable climate envelopes for M. hypopitys at the LGM in both the Pacific Northwest and south-eastern USA. High levels of genetic diversity and endemic haplotypes were found in Oregon, the Alexander Archipelago, Wisconsin, and in the south-eastern part of the species' distribution range. Main conclusions Our results suggest a complex recolonization history for M. hypopitys in North America, involving persistence in separate eastern and western refugia. A generally high degree of congruence between the different marker classes analysed indicated the presence of multiple refugia, with at least two refugia in each area. In the west, putative refugia were identified in Oregon and the Alexander Archipelago, whereas eastern refugia may have been located in the southern part of the species' current distribution, as well as in the 'Driftless Area'. These findings are in contrast to a previous study on the related species Orthilia secunda, which has a similar disjunct distribution to M. hypopitys, but which appears to have recolonized solely from western refugia.Peer reviewe

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“…Sosa et al. , 2009; Rebernig et al. , 2010), although these tend to be species that currently occupy the same areas, rather than those which now exhibit a more northerly distribution.…”

Section: Discussionmentioning

confidence: 99%

Phylogeographic analysis of North American populations of the parasitic herbaceous plant Monotropa hypopitys L. reveals a complex history of range expansion from multiple late glacial refugia

Beatty

Provan²

2011

Journal of Biogeography

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“…The cases of Acacia lobulata and E. caesia in Australia and Discorea biloba in Chile illustrate persistence in isolated regions or specific habitats with relative long-term stability (Byrne, 2008;Viruel et al, 2012). On the other hand, the demographic stability of M. pectinifera contrasts with the contraction and expansion pattern of refugia observed in desert plants of southwestern USA and northern Mexico in response to Pleistocene climatic instability (Rebernig et al, 2010).…”

Section: Divergence Timesmentioning

confidence: 95%

Research Article Quaternary origin and genetic divergence of the endemic cactus Mammillaria pectinifera in a changing landscape in the Tehuacán Valley, Mexico

Cornejo-Romero¹,

Medina-Sánchez²,

Hernández‐Hernández³

et al. 2014

Genet. Mol. Res.

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ABSTRACT. The endemic Mexican cactus, Mammillaria pectinifera, shows low dispersal capabilities and isolated populations within the highly dissected landscape of Tehuacán Valley. These characteristics can restrict gene flow and act upon the genetic divergence and speciation in arid plants. We conducted a phylogeographic study to determine if the origin, current distribution, and genetic structure of M. pectinifera were driven by Quaternary geomorphic processes. Sequences of the plastids psbA-trnH and trnT-trnL obtained from 66 individuals from seven populations were used to estimate genetic diversity. Population differentiation was assessed by an analysis of molecular variance. We applied a stepwise phylogenetic calibration test to determine whether species origin and genetic divergence among haplotypes were temporally concordant with recognizable episodes of geomorphic evolution. The combination of plastid markers yielded six haplotypes, with high levels of haplotype diversity (h = 0.622) and low nucleotide diversity (π = 0.00085). The populations were found to be genetically structured (F ST = 0.682; P < 0.00001), indicating that geographic isolation and limited dispersal were the primary causes of genetic population differentiation. The estimated origin and divergence time among haplotypes were 0.017-2.39 and 0.019-1.237 mya, respectively, which correlates with Pleistocene tectonics and erosion events, supporting a hypothesis of geomorphically-driven geographical isolation. Based on a Bayesian skyline plot, these populations showed long term demographic stability, indicating that persistence in confined habitats has been the main response of this species to landscape changes. We conclude that the origin and haplotype divergence of M. pectinifera were a response to local Quaternary geomorphic evolution.

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“…Despite being traditionally viewed as too restrictive because of the low levels of unreduced gametes observed in natural plant populations, unreduced gamete production nevertheless appears adequate for cytotype coexistence in natural populations (Suda and Herben 2013). For instance, polyploid Melampodium cinereum populations originated recurrently since the last glacial maximum 12,000 yr ago in the Southwestern United States (Rebernig et al 2010), illustrating that polyploids are indeed being formed continuously at an appreciable rate in stable environments. It is furthermore well established that environmental stress and/or fluctuations can even increase unreduced gamete formation in plants (Ramsey and Schemske 1998).…”

Section: Enhanced Polyploid Establishment Through Mitigation Of the Mmentioning

confidence: 99%

Analysis of 41 plant genomes supports a wave of successful genome duplications in association with the Cretaceous–Paleogene boundary

et al. 2014

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Ancient whole-genome duplications (WGDs), also referred to as paleopolyploidizations, have been reported in most evolutionary lineages. Their attributed role remains a major topic of discussion, ranging from an evolutionary dead end to a road toward evolutionary success, with evidence supporting both fates. Previously, based on dating WGDs in a limited number of plant species, we found a clustering of angiosperm paleopolyploidizations around the Cretaceous-Paleogene (K-Pg) extinction event about 66 million years ago. Here we revisit this finding, which has proven controversial, by combining genome sequence information for many more plant lineages and using more sophisticated analyses. We include 38 full genome sequences and three transcriptome assemblies in a Bayesian evolutionary analysis framework that incorporates uncorrelated relaxed clock methods and fossil uncertainty. In accordance with earlier findings, we demonstrate a strongly nonrandom pattern of genome duplications over time with many WGDs clustering around the K-Pg boundary. We interpret these results in the context of recent studies on invasive polyploid plant species, and suggest that polyploid establishment is promoted during times of environmental stress. We argue that considering the evolutionary potential of polyploids in light of the environmental and ecological conditions present around the time of polyploidization could mitigate the stark contrast in the proposed evolutionary fates of polyploids.

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Quaternary range dynamics and polyploid evolution in an arid brushland plant species (Melampodium cinereum, Asteraceae)

Cited by 28 publications

References 108 publications

Phylogeographic analysis of North American populations of the parasitic herbaceous plant Monotropa hypopitys L. reveals a complex history of range expansion from multiple late glacial refugia

Phylogeographic analysis of North American populations of the parasitic herbaceous plant Monotropa hypopitys L. reveals a complex history of range expansion from multiple late glacial refugia

Research Article Quaternary origin and genetic divergence of the endemic cactus Mammillaria pectinifera in a changing landscape in the Tehuacán Valley, Mexico

Analysis of 41 plant genomes supports a wave of successful genome duplications in association with the Cretaceous–Paleogene boundary

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