Two Beringian Origins for the Allotetraploid Fern <i>Polystichum braunii</i> (Dryopteridaceae)

Jorgensen, Stacy A.; Barrington, David S.

doi:10.1600/036364417x694557

Cited by 18 publications

(9 citation statements)

References 64 publications

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“…Given the distribution of I. occidentalis throughout the Sierra Nevada, Rocky Mountains, and Coast Range, glaciation likely played a role in its evolutionary and biogeographic history (Haufler et al , 1995; Burnier et al , 2009; Stein et al , 2010; Sessa et al , 2012a,b; Jorgensen & Barrington, 2020). Progenitors of I. occidentalis may have occurred throughout lakes in northwestern North America, and Quaternary glaciation cycles (Dyke & Prest, 1987; Hughes et al , 1989; Mandryk et al , 2001) could have led to extinction of the diploid parents, while the polyploid I. occidentalis survived in refugia like the ‘ice-free corridor’ in western Canada (Schweger, 1989; Dyke, 2005).…”

Section: Discussionmentioning

confidence: 99%

Revealing the evolutionary history of a reticulate polyploid complex in the genusIsoëtes

et al. 2020

Preprint

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Polyploidy and hybridization are important processes in the evolution of spore-dispersed plants. Few studies, however, focus these dynamics in heterosporous lycophytes, such as Isoetes, where polyploid hybrids are common and thought to be important in the generation of their extant diversity. We investigate reticulate evolution in a complex of western North American quillworts (Isoetes) and provide insights into the evolutionary history of hybrids, and the role of polyploidy in maintaining novel diversity. We utilize low copy nuclear markers, whole plastomes, restriction site-associated DNA sequencing, cytology, and reproductive status (fertile or sterile) to investigate the reticulate evolutionary history of western North American Isoetes. We reconstruct the reticulate evolutionary history and directionality of hybridization events in this complex. The presence of high level polyploids, plus frequent homoploid and interploid hybridization suggests that there are low prezygotic reproductive barriers in this complex, hybridization is common and bidirectional between similar (but not divergent) cytotypes, and that allopolyploidization is important to restore fertility in some hybrid taxa. Our data provide five lines of evidence suggesting that hybridization and polyploidy can occur with frequency in the genus, and these evolutionary processes may be important in shaping extant Isoetes diversity.

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Section: Discussionmentioning

confidence: 99%

Revealing the evolutionary history of a reticulate polyploid complex in the genusIsoëtes

et al. 2020

Preprint

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“…Polystichum braunii (Fig. 63) Polystichum braunii is an allotetraploid species with unknown, most likely extinct ancestral taxa (Jorgensen & Barrington 2017). It has a strongly disjunct circumboreal distribution in the Northern Hemisphere, including European mountain ranges (the Pyrenees, Alps, Carpathians and the Scandes in western Norway), the Caucasus Mts, mountains in central Siberia, in the Far East and in the eastern and western parts of North America (Hultén & Fries 1986).…”

Section: Hieracium Racemosum (Fig 38)mentioning

confidence: 99%

“…It has a strongly disjunct circumboreal distribution in the Northern Hemisphere, including European mountain ranges (the Pyrenees, Alps, Carpathians and the Scandes in western Norway), the Caucasus Mts, mountains in central Siberia, in the Far East and in the eastern and western parts of North America (Hultén & Fries 1986). This species is remarkably genetically uniform, most likely because it is capable of selfing, and likely to have expanded its range in the recent past (Jorgensen & Barrington 2017). In the Czech Republic P. braunii grows most often in the understory of humid beech, spruce and ravine forests at rather high elevations and in the mountains.…”

Section: Hieracium Racemosum (Fig 38)mentioning

confidence: 99%

Distributions of vascular plants in the Czech Republic

Kaplan¹,

Danihelka²,

Šumberová³

et al. 2017

Preslia

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“…The copyright holder for this preprint this version posted February 13, 2020. ; https://doi.org/10.1101/2020.02.12.946202 doi: bioRxiv preprint name. However, this study included only one nuclear marker; multilocus analyses are generally needed to substantiate paraphyly and polyploid origins (Eaton and Ree 2013;Jorgensen and Barrington 2017), and particularly in a case as complex as C. thalictroides.…”

Section: Introductionmentioning

confidence: 99%

Cryptic diversity in the model fern genus Ceratopteris (Pteridaceae)

Kinosian

Pearse

Wolf

2020

Molecular Phylogenetics and Evolution

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Cryptic species are present throughout the tree of life. They are especially prevalent in ferns, because of processes such hybridization, polyploidy, and reticulate evolution. In addition, the morphological simple body plan of ferns limits phenotypic variation and makes it difficult to detect crypic species in ferns without molecular work. The model fern genus Ceratopteris has long been suspected to harbor cryptic diversity, specifically in the highly polymorphic C. thalictroides. Yet no studies have included samples from throughout the pan-tropical range of Ceratopteris or utilized genomic sequencing, making it difficult to assess the full extent of cryptic variation within this genus. Here, we present the first multilocus phylogeny of the genus using reduced representation genomic sequencing (RADseq) and examine population structure, phylogenetic relationships, and ploidy level variation. We recover similar species relationships found in previous studies, find support for a named cryptic species as genetically distinct, and identify a novel putative species from within C. thalictroides sensu latu in Central and South America.

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Two Beringian Origins for the Allotetraploid Fern Polystichum braunii (Dryopteridaceae)

Cited by 18 publications

References 64 publications

Revealing the evolutionary history of a reticulate polyploid complex in the genusIsoëtes

Revealing the evolutionary history of a reticulate polyploid complex in the genusIsoëtes

Distributions of vascular plants in the Czech Republic

Cryptic diversity in the model fern genus Ceratopteris (Pteridaceae)

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