A New Allotetraploid Species of <i>Osmunda</i> (Osmundaceae)

Tsutsumi, Chie; Matsumoto, Sadamu; Yatabe-Kakugawa, Yoko; Hirayama, Yumiko; Kato, Masahiro

doi:10.1600/036364411x604859

Cited by 16 publications

(19 citation statements)

References 17 publications

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“…This low level of local genetic variation contrasted with results recovered in phylogeographical studies of other ferns, especially when considering diploid ferns (e.g., Trewick & al., 2002;Shepherd & al., 2007;Hunt & al., 2009;Wubs & al., 2010;Wang & al., 2011). However, bracken appears to be comparable with Osmunda regalis L. and its close relatives in the accumulation of little genetic diversity in a similarly wide distribution range (Tsutsumi & al., 2011).…”

Section: Discussionmentioning

confidence: 99%

How many species of bracken (Pteridium) are there? Assessing the Chinese brackens using molecular evidence

Zhou

Dong

Chen

et al. 2014

TAXON

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Pteridium (the bracken) is a genus of common and widely distributed ferns throughout the world. The variation patterns of morphology in the genus are highly complex and no consensus has been reached among taxonomists regarding the number of species as well as subdivision of the variable species. To address the question of how many species and subspecies of Pteridium occur in Asia, 75 populations were sampled in Bolivia, China, Japan, Malaysia, Mexico and Peru. Sequence data of three chloroplast DNA regions, rps4‐trnSGGA, rpl16 and trnSGCU‐trnGUCC and the genotype data of three microsatellite loci were collected. The newly generated sequence data combined with the sequences already available from GenBank for samples from all over the world were subjected to several phylogenetic analyses and species delimitation tests. The results support recognition of two diploid species, P. aquilinum in the Northern Hemisphere and Africa and P. esculentum in South America and Australia. Evidence was found to recognize one Asian tetraploid species, P. semihastatum. The Eurasian occurrences of P. aquilinum can be further subdivided into subsp. aquilinum occurring in Africa, Europe and Asia Minor; subsp. japonicum occurring from East Asia to eastern Europe; subsp. wightianum occurring from central China to Malesia (Malay Peninsula, New Caledonia, New Zealand) and northern Australia. The North American subsp. latiusculum was also found in India. Some local “species” recorded in Flora of China likely represent hybrids between subsp. japonicum and subsp. wightianum.

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Section: Discussionmentioning

confidence: 99%

How many species of bracken (Pteridium) are there? Assessing the Chinese brackens using molecular evidence

Zhou

Dong

Chen

et al. 2014

TAXON

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“…× hybrida Tsutsumi, S.Matsumoto, Y.Yatabe, Y.Hiray. & M.Kato in Southeast Asia ( O. regalis × O. japonica ; Tsutsumi et al , 2011), and O . × intermedia (Honda) Sugim.…”

Section: Discussionmentioning

confidence: 99%

A fossilOsmundafrom the Jurassic of Sweden—reconciling molecular and fossil evidence in the phylogeny of Osmundaceae

Bomfleur

Grimm

McLoughlin

2014

Preprint

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1The systematic classification of Osmundaceae has long remained controversial. Recent 2 molecular data indicate that Osmunda is paraphyletic, and needs to be separated into 3Osmundastrum and Osmunda s. str. Here we describe an exquisitely preserved Jurassic 4Osmunda rhizome (O. pulchella sp. nov.) that combines diagnostic features of Osmundastrum 5and Osmunda, calling molecular evidence for paraphyly into question. We assembled a new 6 morphological matrix based on rhizome anatomy, and used network analyses to establish 7 phylogenetic relationships between fossil and extant members of modern Osmundaceae. We 8 re-analysed the original molecular data to evaluate root-placement support. Finally, we 9 integrated morphological and molecular data-sets using the evolutionary placement algorithm. 10Osmunda pulchella and five additional, newly identified Jurassic Osmunda species show 11 anatomical character suites intermediate between Osmundastrum and Osmunda. Molecular 12 evidence for paraphyly is ambiguous: a previously unrecognized signal from spacer sequences 13 favours an alternative root placement that would resolve Osmunda s.l. as monophyletic. Our 14 evolutionary placement analysis identifies fossil species as ancestral members of modern 15 genera and subgenera. Altogether, the seemingly conflicting evidence from morphological, 16 anatomical, molecular, and palaeontological data can be elegantly reconciled under the 17 assumption that Osmunda is indeed monophyletic; the recently proposed root-placement in 18Osmundaceae-based solely on molecular data-likely results from un-or misinformative 19 out-group signals. 20

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“…Evolution of genome size in Osmundaceae through time as recovered by Bayesian diversification time estimates for extant royal ferns. The phylogenetic tree is based on rbcL sequences of all extant species used in previous studies (Yatabe et al ., ; Metzgar et al ., ; Tsutsumi et al ., ), including more than one sample of Osmunda claytoniana , Osmunda regalis , and Osmundastrum cinnamomeum to cover the known spatial differentiation of these species. We also included three samples of Osmunda regalis subsp.…”

Section: Genome Size and Chromosomesmentioning

confidence: 99%

“…The hypothesis that royal ferns exhibit ‘genomic stasis’, might appear to be consistent with the conservation in chromosome number and near complete absence of polyploidy (Zhang et al ., ; see Tsutsumi et al ., ). Yet ‘genomic stasis’ implies that the underlying genomic processes have had no impact on genomic content over time, something that cannot be inferred solely from analysing fossils.…”

mentioning

confidence: 97%

Are the genomes of royal ferns really frozen in time? Evidence for coinciding genome stability and limited evolvability in the royal ferns

Schneider

Clark

et al. 2015

New Phytologist

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A New Allotetraploid Species of Osmunda (Osmundaceae)

Cited by 16 publications

References 17 publications

How many species of bracken (Pteridium) are there? Assessing the Chinese brackens using molecular evidence

How many species of bracken (Pteridium) are there? Assessing the Chinese brackens using molecular evidence

A fossilOsmundafrom the Jurassic of Sweden—reconciling molecular and fossil evidence in the phylogeny of Osmundaceae

Are the genomes of royal ferns really frozen in time? Evidence for coinciding genome stability and limited evolvability in the royal ferns

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