Phylogenetic relationships within Luzula DC. and Juncus L. (Juncaceae): A comparison of phylogenetic signals of trnL-trnF intergenic spacer, trnL intron and rbcL plastome sequence data

Cladistics ◽  
2006 ◽  
Vol 22 (2) ◽  
pp. 132-143 ◽  
Author(s):  
Lenka Drabkova ◽  
Jan Kirschner ◽  
Cestmir Vlcek
Keyword(s):  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Intergenic Spacer ◽  
Trnl Intron

Section Mimadenia: its phylogenetic relationships within the genus Mimosa (Leguminosae, Mimosoideae) using plastid trnL - F sequence data

2011 ◽  
Vol 24 (2) ◽  
pp. 104 ◽  
Author(s):  
C. Bessega ◽  
R. H. Fortunato
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Intergenic Spacer ◽  
Nucleotide Sequences ◽  
Trnl Intron ◽  
Infrageneric Classification ◽  
Morphological Group ◽  
Evolutionary Hypothesis

Mimosa L. includes more than 530 species and is subdivided into five sections, including Mimadenia Barneby, Batocaulon DC., Habbasia DC., Calothamnos Barneby and Mimosa. It has previously been proposed that Mimosa is derived from piptadenioid ancestors and that section Mimadenia is a morphological group intermediate between the piptadenoid ancestor and the remaining species from Mimosa. The main goals of the present study were to assess the monophyly of the genus Mimosa as it is currently described, including representatives of all five sections, test the previous evolutionary hypothesis that section Mimadenia is primitive within Mimosa and discuss the infrageneric classification from a phylogenetic view. We report a phylogenetic analysis of chloroplast nucleotide sequences of the trnL intron and the trnL–trnF intergenic spacer from 36 species of Mimosa, and six related genera. Our analysis indicated that genus Mimosa is monophyletic, and the species of section Mimadenia constitute a clade sister to the rest of the genus. Although section Mimadenia, as described by Barneby (1991), seems to be monophyletic, the remaining sections Barneby (1991) proposed are not resolved as monophyletic. An effort needs to be made towards a new infrageneric classification of Mimosa that considers the phylogenetic evidence.

Pseudoheterocaryum, a new genus segregated from Heterocaryum (Boraginaceae) on the basis of molecular data

2017 ◽  
Vol 30 (1) ◽  
pp. 105 ◽  
Author(s):  
Nasim Saadati ◽  
Maryam Khoshsokhan Mozaffar ◽  
Mahboubeh Sherafati ◽  
Shahrokh Kazempour Osaloo
Keyword(s):  
New Genus ◽  
Sequence Data ◽  
Intergenic Spacer ◽  
Molecular Data ◽  
Trnl Intron ◽  
Internal Transcribed Spacer Region ◽  
Rdna Its ◽  
Taxonomic Descriptions ◽  
Diagnostic Key ◽  
Distinct Branch

The phylogeny of Heterocaryum and Suchtelenia was examined using sequence data from the internal transcribed spacer region of the nuclear rDNA (ITS) and plastid trnL intron and trnL–trnF intergenic spacer (trnL–F) regions. Results indicated that Heterocaryum is non-monophyletic because of the inclusion of Suchtelenia calycina (C.A.Mey.) A.DC. Heterocaryum laevigatum (Kar. & Kir.) A.DC. formed a distinct branch sister to S. calycina and remaining Heterocaryum species. Hence, all species of Heterocaryum except H. laevigatum (type species of the genus) are transferred to a new genus, Pseudoheterocaryum. Taxonomic descriptions are presented for Pseudoheterocaryum and Heterocaryum, as well as a diagnostic key to the three genera included in the present study.

Phylogenetic relationships within Dendroligotrichum and Polytrichadelphus (Polytrichaceae, Polytrichopsida) in the Palaeoaustral region. Studies in austral temperate rainforest bryophytes 32

2008 ◽  
Vol 21 (1) ◽  
pp. 39 ◽  
Author(s):  
Michael Stech ◽  
Tanja Pfeiffer ◽  
Wolfgang Frey
Keyword(s):  
New Zealand ◽  
South America ◽  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Sequence Divergence ◽  
Trnl Intron ◽  
South American ◽  
South American Species ◽  
Southern South America ◽  
The One

Plastid trnT–F and atpB–rbcL spacer sequences as well as AFLP fingerprints are utilised to infer phylogenetic relationships of Dendroligotrichum and Polytrichadelphus taxa (Polytrichaceae) in the palaeoaustral region. Phylogenies based on DNA sequence data support the monophyly of each genus. Relationships within Dendroligotrichum remain ambiguous owing to low sequence divergence. AFLP fingerprinting, however, allows a clear distinction of all included Dendroligotrichum and Polytrichadelphus taxa at the species level. The morphological, distributional, ecological and molecular differences justify the recognition of the following three species in Dendroligotrichum: D. dendroides (Brid. ex Hedw.) Broth. and D. squamosum (Hook.f. & Wilson) Cardot in southern South America, as well as D. microdendron (Müll. Hal.) G.L.Sm. in New Zealand; and the following two species in Polytrichadelphus: P. magellanicus (Hedw.) Mitt. s.str. in southern South America and P. innovans (Müll. Hal.) A.Jäger in Australia and New Zealand. For Polytrichadelphus, the molecular topologies correspond with a vicariance scenario, with a basic split of taxa in the palaeoaustral region followed by migration of southern South American taxa northwards into the Neotropics. In Dendroligotrichum, substitutions and indels in the trnL intron and atpB–rbcL spacer are ambiguous in supporting either a basic split between the South American species and D. microdendron, similar to the one in Polytrichadelphus, or a trans-oceanic dispersal event between New Zealand and southern South America.

Sansevieria (Asparagaceae, Nolinoideae) is a herbaceous clade within Dracaena: inference from non-coding plastid and nuclear DNA sequence data

Phytotaxa ◽  
2018 ◽  
Vol 376 (6) ◽  
pp. 254 ◽  
Author(s):  
RATIDZAYI TAKAWIRA-NYENYA ◽  
LADISLAV MUCINA ◽  
WARREN M. CARDINAL-MCTEAGUE ◽  
KEVIN R. THIELE
Keyword(s):  
Nuclear Dna ◽  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Intergenic Spacer ◽  
Plastid Dna ◽  
Trnl Intron ◽  
Dna Sequence Data ◽  
Molecular Phylogenetic ◽  
Phylogenetic Hypotheses ◽  
Generic Description

The evolutionary history of the dracaenoid genera Dracaena and Sansevieria (Asparagaceae, Nolinoideae) remains poorly resolved, despite long-recognised issues with their generic boundaries and increased attention paid by both horticulturalists and taxonomists. In this study we aim to: (1) elucidate evolutionary relationships within and between Dracaena and Sansevieria using molecular phylogenetic inference of both nuclear (nDNA) and plastid (cpDNA) markers, (2) examine the infrageneric classifications of each genus, and (3) revise the circumscription of the dracaenoids in light of morphological and phylogenetic evidence. In total, we sampled 21 accessions of Dracaena (ca. 19 species), 27 accessions of Sansevieria (ca. 26 species), and six outgroup taxa. Phylogenetic analyses were based on nucleotide sequences of two non-coding plastid DNA regions, the trnL-F region (trnL intron and trnL-trnF intergenic spacer) and rps16 intron, and the low-copy nuclear region At103. Phylogenetic hypotheses were constructed using maximum parsimony, maximum likelihood, and Bayesian inference. Individual datasets were analysed separately and, after testing for congruence, as combined datasets. We recovered instances of soft incongruence between nDNA and cpDNA datasets in Sansevieria, but general trends in the dracaenoids were congruent, although often poorly supported or resolved. The dracaenoids constitute a strongly supported monophyletic group. Dracaena was resolved as a paraphyletic grade embedded with two clades of Sansevieria, a primary clade comprising most species, and a secondary clade including S. sambiranensis, a distinctive species from Madagascar. The backbone of our phylogeny was only resolved in nDNA analyses, but combined analyses recovered strongly supported species groups. None of the previous infrageneric classifications were supported by our phylogeny, and biogeographic groupings were frequently more significant than morphology. More work is needed to resolve internal relationships in the dracaenoids, but we support a recent proposal to recognise a broadened circumscription of Dracaena that includes Sansevieria. We provide a generic description for the recircumscribed Dracaena and new combinations for several species of Sansevieria in Dracaena.

scholarly journals Two Complete Mitochondrial Genomes of Mileewinae (Hemiptera: Cicadellidae) and a Phylogenetic Analysis

Insects ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 668
Author(s):  
Tinghao Yu ◽  
Yalin Zhang
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationships ◽  
Phylogenetic Trees ◽  
Strong Support ◽  
Intergenic Spacer ◽  
Taxonomic Status ◽  
Start Codon ◽  
Gene Arrangement ◽  
Mitochondrial Genomes ◽  
Protein Coding

More studies are using mitochondrial genomes of insects to explore the sequence variability, evolutionary traits, monophyly of groups and phylogenetic relationships. Controversies remain on the classification of the Mileewinae and the phylogenetic relationships between Mileewinae and other subfamilies remain ambiguous. In this study, we present two newly completed mitogenomes of Mileewinae (Mileewa rufivena Cai and Kuoh 1997 and Ujna puerana Yang and Meng 2010) and conduct comparative mitogenomic analyses based on several different factors. These species have quite similar features, including their nucleotide content, codon usage of protein genes and the secondary structure of tRNA. Gene arrangement is identical and conserved, the same as the putative ancestral pattern of insects. All protein-coding genes of U. puerana began with the start codon ATN, while 5 Mileewa species had the abnormal initiation codon TTG in ND5 and ATP8. Moreover, M. rufivena had an intergenic spacer of 17 bp that could not be found in other mileewine species. Phylogenetic analysis based on three datasets (PCG123, PCG12 and AA) with two methods (maximum likelihood and Bayesian inference) recovered the Mileewinae as a monophyletic group with strong support values. All results in our study indicate that Mileewinae has a closer phylogenetic relationship to Typhlocybinae compared to Cicadellinae. Additionally, six species within Mileewini revealed the relationship (U. puerana + (M. ponta + (M. rufivena + M. alara) + (M. albovittata + M. margheritae))) in most of our phylogenetic trees. These results contribute to the study of the taxonomic status and phylogenetic relationships of Mileewinae.

scholarly journals Noteworthy record of the Ethiopian genet, Genetta abyssinica, (Carnivora, Viverridae) from Djibouti informs its phylogenetic position within Genetta

Mammalia ◽  
2019 ◽  
Vol 83 (2) ◽  
pp. 180-189 ◽  
Author(s):  
Adam W. Ferguson ◽  
Houssein R. Roble ◽  
Molly M. McDonough
Keyword(s):  
Phylogenetic Relationships ◽  
Sequence Data ◽  
Alternative Hypothesis ◽  
Phylogenetic Analyses ◽  
Phylogenetic Position ◽  
Sister Relationship ◽  
Molecular Sequence Data ◽  
Molecular Sequence ◽  
Molecular Phylogenetic ◽  
Relationship Of

AbstractThe molecular phylogeny of extant genets (Carnivora, Viverridae,Genetta) was generated using all species with the exception of the Ethiopian genetGenetta abyssinica. Herein, we provide the first molecular phylogenetic assessment ofG. abyssinicausing molecular sequence data from multiple mitochondrial genes generated from a recent record of this species from the Forêt du Day (the Day Forest) in Djibouti. This record represents the first verified museum specimen ofG. abyssinicacollected in over 60 years and the first specimen with a specific locality for the country of Djibouti. Multiple phylogenetic analyses revealed conflicting results as to the exact relationship ofG. abyssinicato otherGenettaspecies, providing statistical support for a sister relationship to all other extant genets for only a subset of mitochondrial analyses. Despite the inclusion of this species for the first time, phylogenetic relationships amongGenettaspecies remain unclear, with limited nodal support for many species. In addition to providing an alternative hypothesis of the phylogenetic relationships among extant genets, this recent record provides the first complete skeleton of this species to our knowledge and helps to shed light on the distribution and habitat use of this understudied African small carnivore.

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