scholarly journals Molecular phylogenetic relationships of Melanthiaceae (Liliales) based on plastid DNA sequences

2016 ◽  
Vol 181 (4) ◽  
pp. 567-584 ◽  
Author(s):  
Sang-Chul Kim ◽  
Jung Sung Kim ◽  
Mark W. Chase ◽  
Michael F. Fay ◽  
Joo-Hwan Kim
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Plastid Dna ◽  
Molecular Phylogenetic

Phylogenetic relationships based on nuclear and plastid DNA sequences reveal recent diversification and discordant patterns of morphological evolution of the Chilean genera of Gilliesieae (Amaryllidaceae: Allioideae)

2020 ◽  
Vol 194 (1) ◽  
pp. 84-99
Author(s):  
Inelia Escobar ◽  
Eduardo Ruiz-Ponce ◽  
Paula J Rudall ◽  
Michael F Fay ◽  
Oscar Toro-Núñez ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Incomplete Lineage Sorting ◽  
Morphological Evolution ◽  
Strong Support ◽  
Plastid Dna ◽  
Lineage Sorting ◽  
Generic Level ◽  
Molecular Analyses ◽  
Floral Diversity

Abstract Gilliesieae are a South American tribe of Amaryllidaceae characterized by high floral diversity. Given different taxonomic interpretations and proposals for generic and specific relationships, a representative phylogenetic analysis is required to clarify the systematics of this group. The present study provides a framework for understanding phylogenetic relationships and contributing to the development of an appropriate taxonomic treatment of Gilliesieae. Molecular analyses, based on nuclear (ITS) and plastid DNA sequences (trnL-F and rbcL), resolve with strong support the monophyly of the tribe and the differentiation of two major clades. Clade I comprises the genera Gilliesia, Gethyum and Solaria and Clade II includes Miersia and Speea. These well-supported clades are mostly congruent with vegetative and karyotype characters rather than, e.g., floral symmetry. At the generic level, all molecular analyses reveal the paraphyly of Gilliesia and Miersia. Gethyum was found to be paraphyletic, resulting in the confirmation of Ancrumia as a distinct genus. Several instances of incongruent phylogenetic signals were found among data sets. The calibrated tree suggests a recent diversification of the tribe (Pliocene–Pleistocene), a contemporary process of speciation in which instances of hybridization and incomplete lineage sorting could explain patterns of paraphyly and incongruence of floral morphology.

scholarly journals Jumping through the hoops: the challenges of daffodil (Narcissus) classification

2019 ◽  
Vol 190 (4) ◽  
pp. 389-404 ◽  
Author(s):  
Kálmán Könyves ◽  
John David ◽  
Alastair Culham
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Trees ◽  
Plastid Dna ◽  
Microsatellite Data ◽  
Population Sampling ◽  
Molecular Phylogenetic ◽  
History Of ◽  
Nuclear Microsatellite ◽  
Congruent Group ◽  
First Time

Abstract Hoop-petticoat daffodils are a morphologically congruent group comprised of two distinct lineages in molecular phylogenetic trees of Narcissus. It is possible that the morphological similarity is a product of both historic and current low-level gene flow between these lineages. For the first time, we report population sampling from across the entire range of distribution covering the Iberian Peninsula and Morocco. In total, 455 samples were collected from 59 populations. Plastid DNA sequences of matK and ndhF were generated alongside 11 microsatellite loci to permit comparison between plastid and nuclear lineage histories. The plastid DNA phylogenetic tree was highly congruent with previous molecular studies and supported the recognition of these two lineages of hoop-petticoat daffodils as separate sections. Assignment of samples to sections sometimes differed between plastid DNA and (nuclear) microsatellite data. In these cases, the taxa had previously been the focus of dissent in taxonomic placement based on morphology. These discrepancies could be explained by hybridization and introgression among the two lineages during the evolution of hoop-petticoat daffodils, and shows that placement of species in sections is dependent on the source of data used. This study underlines the complex evolutionary history of Narcissus and highlights the discrepancies between floral morphology and phylogeny, which provides a continuing challenge for the systematics of Narcissus.

Phylogenetic relationships and classification of the Malagasy pseudoxyrhophiine snake genera Geodipsas and Compsophis based on morphological and molecular data

Zootaxa ◽  
2007 ◽  
Vol 1517 (1) ◽  
pp. 53-62 ◽  
Author(s):  
FRANK GLAW ◽  
ZOLTÁN T. NAGY ◽  
MIGUEL VENCES
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Close Relationships ◽  
Original Description ◽  
Molecular Data ◽  
Morphological Data ◽  
Molecular Phylogenetic ◽  
Species Groups ◽  
Morphological And Molecular Data

Based on a specimen found at Montagne d'Ambre in northern Madagascar morphologically agreeing with Compsophis albiventris Mocquard, 1894, we report on the rediscovery of this enigmatic snake genus and species and its molecular phylogenetic relationships. Compsophis albiventris, considered to be the only representative of its genus and unreported since its original description, bears strong morphological similarities to species of Geodipsas Boulenger, 1896. A molecular phylogeny based on DNA sequences of three mitochondrial and nuclear genes (complete cytochrome b, fragments of 16S rRNA and c-mos) in Compsophis albiventris and three Geodipsas species corroborated close relationships between C. albiventris and Geodipsas boulengeri, and showed that the genera Compsophis and Geodipsas together form a monophyletic unit. Despite the general similarities, morphological data and chromatic features support the existence of two species groups, corresponding to Compsophis and Geodipsas. We consequently consider Geodipsas as a subgenus of Compsophis and transfer all species currently in Geodipsas into the genus Compsophis.

Species boundaries and phylogenetic relationships within the green algal genus Codium (Bryopsidales) based on plastid DNA sequences

2007 ◽  
Vol 44 (1) ◽  
pp. 240-254 ◽  
Author(s):  
Heroen Verbruggen ◽  
Frederik Leliaert ◽  
Christine A. Maggs ◽  
Satoshi Shimada ◽  
Tom Schils ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Plastid Dna ◽  
Species Boundaries ◽  
Green Algal ◽  
Algal Genus

scholarly journals MOLECULAR PHYLOGENETIC RELATIONSHIPS IN GENUS SOLANUM (SOLANACEAE) USING NON-CODING DNA SEQUENCES

2018 ◽  
Author(s):  
TopaleMayuri P Gawande Prashant A KhandayAshiq H TopaleMayuri P Gawande Prashant A KhandayAshiq H ◽  
Keyword(s):  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Molecular Phylogenetic

scholarly journals Molecular phylogeny of Saudi Arabian Tetraena Maxim. and Zygophyllum L. (Zygophyllaceae) based on plastid DNA sequences

2017 ◽  
Vol 24 (2) ◽  
pp. 155-164 ◽  
Author(s):  
Dhafer Ahmed Alzahrani ◽  
Enas Jameel Albokhari
Keyword(s):  
Phylogenetic Analysis ◽  
Molecular Phylogeny ◽  
Chloroplast Dna ◽  
Dna Sequences ◽  
Phylogenetic Relationships ◽  
Maximum Parsimony ◽  
Saudi Arabian ◽  
Plastid Dna ◽  
Plant Taxon ◽  
Bayesian Criteria

In order to provide a basis for better understanding of phylogenetic relationships of Saudi Arabian Tetraena Maxim. and Zygophyllum L., 44 specimens representing seven taxa, were reconstructed based on chloroplast DNA data of rbcL and trnL-F. The combined chloroplast (rbcL and trnL-F) contributed more phylogenetically informative characters than in individual regions. Phylogenetic analysis of the combined chloroplast (rbcL and trnL-F) and in individual regions based on both of Maximum Parsimony and Bayesian criteria showed that the Saudi Arabian species of Tetraena and Zygophyllum were monophyletic. Zygophyllum fabag L. was nested in one clade with Z. xanthoxylum (Bunge) Engl. (Asian species), and all taxa of Tetraena were distributed in other clades.Bangladesh J. Plant Taxon. 24(2): 155–164.

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