Recent Changes and Corrections in the Taxonomy of Indian Pteridophytes: Part-1

Fraser‐Jenkins, Christopher R.; S, Rua de São Mateus; Dt., Fontainhas C; Kholia, B. S.; Kandel, Durga; Laboratories, Godavary Botanical

doi:10.54207/bsmps1000-2019-vg1669

Cited by 15 publications

(28 citation statements)

References 6 publications

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“…Because alloPPnet cannot accommodate ploidy levels higher than tetraploid, one accession (× Cystocarpiumroskamianum Fraser‐Jenk. ; Fraser‐Jenkins, 2008; Fraser‐Jenkins et al, 2010), which is an intergeneric allotetraploid hybrid of two other allotetraploids and thus includes four distinct evolutionary histories (Rothfels et al, 2015), was treated by Rothfels et al (2017) as two tetraploids (one for each of its parental genera). With homologizer, this ad hoc solution is not necessary, so we reanalyzed these data with × Cystocarpium roskamianum allotted four tips in the mul‐tree (to accommodate the homeologs of × Cystocarpium ), and most other tetraploids allotted two tips.…”

Section: Methodsmentioning

confidence: 99%

homologizer: Phylogenetic phasing of gene copies into polyploid subgenomes

2023

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Organisms such as allopolyploids and F1 hybrids contain multiple distinct subgenomes, each potentially with its own evolutionary history. These organisms present a challenge for multilocus phylogenetic inference and other analyses since it is not apparent which gene copies from different loci are from the same subgenome and thus share an evolutionary history. Here we introduce homologizer, a flexible Bayesian approach that uses a phylogenetic framework to infer the phasing of gene copies across loci into their respective subgenomes. Through the use of simulation tests, we demonstrate that homologizer is robust to a wide range of factors, such as incomplete lineage sorting and the phylogenetic informativeness of loci. Furthermore, we establish the utility of homologizer on real data, by analysing a multilocus dataset consisting of nine diploids and 19 tetraploids from the fern family Cystopteridaceae. Finally, we describe how homologizer may potentially be used beyond its core phasing functionality to identify non‐homologous sequences, such as hidden paralogs or contaminants.

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Section: Methodsmentioning

confidence: 99%

homologizer: Phylogenetic phasing of gene copies into polyploid subgenomes

2023

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“…Li & Windham (Li et al, 2012) y Myriopteris Fée (Grusz & Windham, 2013), o paleotropicales como Aleuritopteris Fée y Oeosporangium Vis. Fraser-Jenkins, 2016;Fraser-Jenkins et al, 2016[2017), dejando a Cheilanthes con aproximadamente 100 especies a nivel mundial (PPG I, 2016).…”

Section: Introductionunclassified

Análisis moleculares y observaciones morfo-anatómicas de Cheilanthes volcanensis (Pteridaceae) definen sus relaciones dentro de la subfamilia Cheilanthoideae en Sudamérica

Ponce¹,

Scataglini²,

Hernández³

et al. 2023

Darwiniana, nueva serie

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The circumscription of the genus Cheilanthes Sw. is supported by molecular and morphological characters; nevertheless, the taxonomic status of some species remains uncertain because they have not been molecularly tested yet. This study analyzes the belonging of Cheilanthes volcanensis de la Sota to this genus, since this species was treated with doubts about its generic identity. From a morphological approach, C. volcanensis is close to Cheilanthes species with pentagonal and highly divided leaf blades; petioles and rachises castaneous to black, glabrous, usually grooved adaxially; features that are also largely representative of the morphological circumscription of the genus Gaga Pryer, F.W. Li & Windham. The molecular analysis of a recent collection, identified a priori as C. volcanensis, demonstrated with high support that the species belongs to the genus Cheilanthes s. str., as was described originally. Finally, morpho-anatomical observations of this species and related species are also provided, which support its phylogenetic position and contribute to the correct generic delimitation of Cheilanthes s. str.

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Section: Introductionmentioning

confidence: 99%

“…In India, taxonomical studies on the genus have been carried out by various workers (Dixit 1992; Madhusoodanan and Nampy 1994; Antony et al 2002; Ghosh 2004; Nisha et al 2010; Singh et al 2012; Fraser-Jenkins 2016). However, studies on microscpores morphology using a scanning electron microscope (SEM) are sparse and have been carried out only on 10 species (Singh et al 2016), leaving many other Indian species unexamined (Fraser-Jenkins et al 2017; Singh et al 2020). In the present work, we undertake a detailed analysis of microscpores size, color, shape, proximal surface, distal surface, lateral surface and surface ornamentation in 18 species of Selaginellaceae from Arunachal Pradesh, using a light microscope (LM) and SEM.…”

Section: Introductionmentioning

confidence: 99%

“…Selaginellaceae Willk. is the family of fern allies comprising the largest group within the lycophytes (Christenhusz et al 2011;Setyawan 2011; consisting of 750-800 species distributed worldwide (Shalimov et al 2019;Zhou et al 2022) and about 59 species in India (Jenkins et al 2016;Singh et al 2020). The members of the family are herbaceous, having different growth forms, and heterosporous.…”

Section: Introductionmentioning

confidence: 99%

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Taxonomic significance of microspores in some selected species of the family Selaginellaceae from Arunachal Pradesh, India

et al. 2023

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The microspores morphology of 18 species of Selaginellaceae found in Arunachal Pradesh, North East India, is studied using light microscopy and electron microscopy. Of the 18 taxa examined here, the study of five taxa is attempted for the first time using an electron microscope. The species studied exhibit variation in size, shape, color and ornamentation of the microscpores. The equatorial diameter ranges from 11 to 57 mm. The tetrad form of the microscpores is recorded in four species. The variations in the microscpores ornamentation within the species of the family are useful in identification, classification and taxonomic distinction of the species. An identification key is provided for the species under study. This research is beneficial for the enumeration of basic information of microspores of the family and for the precise identification of Selaginella species. Statistical analysis of the distal and proximal surface ornamentation of the microspores is also provided.

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Recent Changes and Corrections in the Taxonomy of Indian Pteridophytes: Part-1

Cited by 15 publications

References 6 publications

homologizer: Phylogenetic phasing of gene copies into polyploid subgenomes

homologizer: Phylogenetic phasing of gene copies into polyploid subgenomes

Análisis moleculares y observaciones morfo-anatómicas de Cheilanthes volcanensis (Pteridaceae) definen sus relaciones dentro de la subfamilia Cheilanthoideae en Sudamérica

Taxonomic significance of microspores in some selected species of the family Selaginellaceae from Arunachal Pradesh, India

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