Cryptic characteristics distinguish diploid and triploid varieties of <i>Pteris fauriei</i> (Pteridaceae)

Huang, Yao‐Moan; Chou, Hsueh-Mei; Hsieh, Tsung‐Hsin; Wang, Jenn-Che WangJ.-C.; Chiou, Wen‐Liang

doi:10.1139/b05-160

Cited by 29 publications

(23 citation statements)

References 23 publications

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“…minor and P. fauriei var. fauriei, respectively [46]. Because the triploids have 29 trivalents at meiosis [27], it is likely that they arose via autopolyploidy.…”

Section: Polyploidy and The Variation Of Pteris Speciesmentioning

confidence: 99%

Polyploidy and Speciation in Pteris (Pteridaceae)

et al. 2012

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The highest frequency of polyploidy among plants is considered to occur in the Pteridophytes. In this study, we focused on polyploidy displayed by a specific fern taxon, the genus Pteris L. (Pteridaceae), comprising over 250 species. Cytological data from 106 Pteris species were reviewed. The base number of chromosomes in Pteris is 29. Polyploids are frequently found in Pteris, including triploids, tetraploids, pentaploids, hexaploids, and octoploids. In addition, an aneuploid species, P. deltodon Bak., has been recorded. Furthermore, the relationship between polyploidy and reproductive biology is reviewed. Among these 106 Pteris species, 60% exhibit polyploidy: 22% show intraspecific polyploidy and 38% result from polyploid speciation. Apogamous species are common in Pteris. Diploids are the most frequent among Pteris species, and they can be sexual or apogamous. Triploids are apogamous; tetraploids are sexual or apogamous. Most Pteris species have one to two ploidy levels. The diverse ploidy levels suggest that these species have a complex evolutionary history and their taxonomic problems require further clarification.

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“…minor and P. fauriei var. fauriei, respectively [46]. Because the triploids have 29 trivalents at meiosis [27], it is likely that they arose via autopolyploidy.…”

Section: Polyploidy and The Variation Of Pteris Speciesmentioning

confidence: 99%

Polyploidy and Speciation in Pteris (Pteridaceae)

et al. 2012

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“…Takamiya et al 1999, Takamiya et al 2001, Huang et al 2006. Thus, the spore number was also counted to predict the reproductive mode in this study.…”

Section: Reproductive Mode and Spore Number Per Sporangiummentioning

confidence: 93%

First insights into the evolutionary history of the <I>Davallia repens</I> complex

Chen¹,

Ngan²,

Hidayat³

et al. 2014

Blum - J Plant Tax and Plant Geog

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Davallia repens and its close relatives have been identified as a species complex in this study because of the existence of continuously morphological variation. To decipher its evolutionary history, integrated methodologies were applied in this study including morphology, cytology, reproductive biology and molecular phylogeny. Analysis of morphological characters reveals several important discriminating characteristics, such as the shape of stipe scales, frond and indusium. Both diploid and polyploid forms are present in the complex and reproduce sexually and by apogamy, respectively. The incongruence between cpDNA and nDNA phylogeny indicates a hybrid origin for most polyploid individuals. Based on the present results, we hypothesize that there were at least two ancestral lineages distributed in the Malesian region. Through hybridization, polyploidization and apogamy, some polyploid genotypes dispersed outwards to shape the extant distribution.

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“…5). In Polypodiales, sporogenesis leading to the formation of 64 spores in a sporangium is by far the most common pattern of sexually reproducing species, e.g., Aspleniaceae (Gabancho et al 2010), Athyriaceae (Kato et al 1992, Takamiya et al 1999), Davalliaceae (Chen et al 2014), Dryopteridaceae (Lu et al 2006), Polypodiaceae (Wang et al 2011), Pteridaceae (Huang et al 2006), and Thelypteridaceae (Ebihara et al 2014). Cases of sporogenesis resulting in 32 spores per sporangium are known from a few Polypodiales ferns but all belong to the suborders Lindsaeineae and Pteridineae, i.e., Lindsaeaceae (Lin et al 1990), Cystodiaceae (Gastony 1981), and Ceratopteris (Pteridaceae; Lloyd 1973).…”

Section: Taxonomic Treatmentmentioning

confidence: 99%

Phylogenetic analyses place the monotypic Dryopolystichum within Lomariopsidaceae

Chen¹,

Sundue²,

Kuo³

et al. 2017

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The monotypic fern genus Dryopolystichum Copel. combines a unique assortment of characters that obscures its relationship to other ferns. Its thin-walled sporangium with a vertical and interrupted annulus, round sorus with peltate indusium, and petiole with several vascular bundles place it in suborder Polypodiineae, but more precise placement has eluded previous authors. Here we investigate its phylogenetic position using three plastid DNA markers, rbcL, rps4-trnS, and trnL-F, and a broad sampling of Polypodiineae. We also provide new data on Dryopolystichum including spore number counts, reproductive mode, spore SEM images, and chromosome counts. Our maximum-likelihood and Bayesian-inference phylogenetic analyses unambiguously place Dryopolystichum within Lomariopsidaceae, a position not previously suggested. Dryopolystichum was resolved as sister to a clade comprising Dracoglossum and Lomariopsis, with Cyclopeltis as sister to these, but clade support is not robust. All examined sporangia of Dryopolystichum produced 32 spores, and the chromosome number of sporophyte somatic cells is ca. 164. Flow cytometric results indicated that the genome size in the spore nuclei is approximately half the size of those from sporophyte leaf tissues, suggesting that Dryopolystichum reproduces sexually. Our findings render Lomariopsidaceae as one of the most morphologically heterogeneous fern families. A recircumscription is provided for both Lomariopsidaceae and Dryopolystichum, and selected characters are briefly discussed considering the newly generated data.

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Cryptic characteristics distinguish diploid and triploid varieties of Pteris fauriei (Pteridaceae)

Cited by 29 publications

References 23 publications

Polyploidy and Speciation in Pteris (Pteridaceae)

Polyploidy and Speciation in Pteris (Pteridaceae)

First insights into the evolutionary history of the <I>Davallia repens</I> complex

Phylogenetic analyses place the monotypic Dryopolystichum within Lomariopsidaceae

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