scholarly journals Molecular Systematics and Biogeography of Crawfurdia, Metagentiana and Tripterospermum (Gentianaceae) Based on Nuclear Ribosomal and Plastid DNA Sequences

2005 ◽  
Vol 96 (3) ◽  
pp. 413-424 ◽  
Author(s):  
SHENGYUN CHEN ◽  
TAO XIA ◽  
YUJIN WANG ◽  
JIANQUAN LIU ◽  
SHILONG CHEN
Keyword(s):  
Molecular Systematics ◽  
Dna Sequences ◽  
Plastid Dna

scholarly journals Molecular systematics of Gagea and Lloydia (Liliaceae; Liliales): implications of analyses of nuclear ribosomal and plastid DNA sequences for infrageneric classification

2009 ◽  
Vol 104 (1) ◽  
pp. 125-142 ◽  
Author(s):  
M. Zarrei ◽  
P. Wilkin ◽  
M. F. Fay ◽  
M. J. Ingrouille ◽  
S. Zarre ◽  
...  
Keyword(s):  
Molecular Systematics ◽  
Dna Sequences ◽  
Plastid Dna ◽  
Infrageneric Classification

scholarly journals Molecular systematics of some bifurcate hairy sections in Astragalus L. (Fabaceae) as inferred from nuclear and chloroplast DNA sequences

2016 ◽  
Vol 23 (2) ◽  
pp. 223-235 ◽  
Author(s):  
Reza Sheikhakbari-Mehr ◽  
Ali Asghar Maassoumi ◽  
Shahrokh Kazempour Osaloo
Keyword(s):  
Chloroplast Dna ◽  
Molecular Systematics ◽  
Dna Sequences ◽  
Plastid Dna ◽  
Monophyletic Group ◽  
Monophyletic Clade ◽  
Plant Taxon ◽  
Chloroplast Dna Sequences ◽  
Established Species ◽  
Astragalus Sect

In this study, 38 species belonging to some bifurcate hairy sections of Astragalus L. were analyzed phylogenetically, using nuclear and plastid DNA sequences. Based on our results, Astragalus sect. Dissitiflori DC. with the inclusion of the members of section Erioceras Bunge, formed a monophyletic group. The members of sect. Ornithopodium Bunge and Onobrychoidei DC. were located together within a highly supported monophyletic clade, apart from other sections studied, on the basis of the present molecular data.The positioning of the enigmatic, recently established species, A. juladakensis Maassoumi, within the sect. Dissitiflori was verified. In addition, our results showed that A. pravitzii Podl., which had been already transferred to sect. Ornithopodium, belongs to the section Dissitiflori.Bangladesh J. Plant Taxon. 23(2): 223-235, 2016 (December)

scholarly journals Molecular phylogeny ofSolms-laubachia(Brassicaceae) s.l., based on multiple nuclear and plastid DNA sequences, and its biogeographic implications

2009 ◽  
Vol 47 (5) ◽  
pp. 402-415 ◽  
Author(s):  
Ji-Pei YUE ◽  
Hang SUN ◽  
David A. BAUM ◽  
Jian-Hua LI ◽  
Ihsan A. AL-SHEHBAZ ◽  
...  
Keyword(s):  
Molecular Phylogeny ◽  
Dna Sequences ◽  
Plastid Dna

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.

A Phylogenetic Analysis of Loasaceae Subfamily Loasoideae Based on Plastid DNA Sequences

2005 ◽  
Vol 166 (2) ◽  
pp. 289-300 ◽  
Author(s):  
Larry Hufford ◽  
Michelle M. McMahon ◽  
Robin O’Quinn ◽  
Muriel E. Poston
Keyword(s):  
Phylogenetic Analysis ◽  
Dna Sequences ◽  
Plastid Dna

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.

Novel Neidium Pfitzer species from western Canada based upon morphology and plastid DNA sequences

Phytotaxa ◽  
2019 ◽  
Vol 419 (1) ◽  
pp. 39-62 ◽  
Author(s):  
PAUL B. HAMILTON ◽  
AMANDA M. SAVOIE ◽  
CYNTHIA M. SAYRE ◽  
OLIVER SKIBBE ◽  
JONAS ZIMMERMANN ◽  
...  
Keyword(s):  
Dna Sequences ◽  
External Surface ◽  
Sequence Data ◽  
Lake Victoria ◽  
Plastid Dna ◽  
Botanical Garden ◽  
Western Canada ◽  
Nutrient Loads ◽  
Small Stream ◽  
Stream System

Five taxa in the genus Neidium, N. iridis, N. beatyi sp. nov., N. vandusenense sp. nov., N. collare sp. nov. and N. lavoieanum sp. nov. are documented from a pond and stream system in the VanDusen Botanical Garden, Vancouver, Canada. Neidium beatyi is a large linear species with multiple longitudinal canals and sagittate apices. The areolae are occluded by finger-like silica extensions on the external surface. This taxon is distinguished from Neidium iridis by the number of longitudinal canals (>5), shape of the valve apices, and smaller size. Neidium vandusenense is broadly linear with distinct rostrate apices. Two-three longitudinal canals are present along each margin. Plastid rbcL sequence data associates this taxon with N. amphigomphus. Neidium collare is an elliptic lanceolate taxon with one longitudinal canal. This taxon is genetically related to N. bisculatum sensu lato, but with a different shape form. Neidium lavoieanum has a valve shape form similar to Neidium potapovae, but is larger and genetically similar to N. productum sensu lato. The five Neidium taxa were observed in a small stream next to Lake Victoria (pond) in the VanDusen Botanical Garden Vancouver, Canada. The water was mildly alkaline with a pH of 7.86, a conductance of 163 µS/cm, higher nutrient loads and low metal content.

Phylogenetic placement of the enigmatic genus Holocheila (Lamiaceae) inferred from plastid DNA sequences

Taxon ◽  
2014 ◽  
Vol 63 (2) ◽  
pp. 355-366 ◽  
Author(s):  
Ya-Ping Chen ◽  
Bo Li ◽  
Richard G. Olmstead ◽  
Philip D. Cantino ◽  
En-De Liu ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Plastid Dna ◽  
Phylogenetic Placement

Phylogeny of the Paniceae (Poaceae: Panicoideae): integrating plastid DNA sequences and morphology into a new classification (project)

10.7934/p942 ◽  
2014 ◽  
Author(s):  
M Morrone ◽  
A Aagesen ◽  
A Scataglini ◽  
L Salariato ◽  
S Denham ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Plastid Dna ◽  
New Classification ◽  
Classification Project
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