scholarly journals Molecular phylogenetic analysis among bryophytes and tracheophytes based on combined data of plastid coded genes and the 18S rRNA gene

1999 ◽  
Vol 16 (8) ◽  
pp. 1027-1036 ◽  
Author(s):  
T. Nishiyama ◽  
M. Kato
Keyword(s):  
Phylogenetic Analysis ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Molecular Phylogenetic Analysis ◽  
Rrna Gene ◽  
Molecular Phylogenetic ◽  
Combined Data

Phylogenetic analysis based on 18S rRNA gene sequences ofSchellackiaparasites (Apicomplexa: Lankesterellidae) reveals their close relationship to the genusEimeria

Parasitology ◽  
2013 ◽  
Vol 140 (9) ◽  
pp. 1149-1157 ◽  
Author(s):  
R. MEGÍA-PALMA ◽  
J. MARTÍNEZ ◽  
S. MERINO
Keyword(s):  
Phylogenetic Analysis ◽  
Blood Cells ◽  
18S Rrna ◽  
Taxonomic Status ◽  
Refractile Body ◽  
18S Rrna Gene ◽  
Blood Parasites ◽  
Recent Common Ancestor ◽  
Rrna Gene ◽  
Amphibian Species

SUMMARYIn the present study we detectedSchellackiahaemoparasites infecting the blood cells ofLacerta schreiberiandPodarcis hispanica, two species of lacertid lizards from central Spain. The parasite morphometry, the presence of a refractile body, the type of infected blood cells, the kind of host species, and the lack of oocysts in the fecal samples clearly indicated these blood parasites belong to the genusSchellackia. Until now, the species of this genus have never been genetically characterized and its taxonomic position under the Lankesterellidae family is based on the lack of the exogenous oocyst stage. However, the phylogenetic analysis performed on the basis of the 18S rRNA gene sequence revealed that species of the genusSchellackiaare clustered withEimeriaspecies isolated from a snake and an amphibian species but not withLankesterellaspecies. The phylogenetic analysis rejects that both genera share a recent common ancestor. Based on these results we suggest a revision of the taxonomic status of the family Lankesterellidae.

scholarly journals Proposal of Mingxiaea gen. nov. for the anamorphic basidiomycetous yeast species in the Bulleribasidium clade (Tremellales) based on molecular phylogenetic analysis, with six new combinations and four novel species

2011 ◽  
Vol 61 (1) ◽  
pp. 210-219 ◽  
Author(s):  
Qi-Ming Wang ◽  
Feng-Yan Bai ◽  
Bundit Fungsin ◽  
Teun Boekhout ◽  
Takashi Nakase
Keyword(s):  
Phylogenetic Analysis ◽  
Type Strain ◽  
Yeast Species ◽  
Novel Species ◽  
Southern China ◽  
Basidiomycetous Yeast ◽  
Molecular Phylogenetic Analysis ◽  
Rrna Gene ◽  
New Combinations ◽  
Molecular Phylogenetic

The distinction and monophyletic property of the basidiomycetous yeast species in the Bulleribasidium clade of the order Tremellales was resolved by molecular phylogenetic analysis based on the combined sequences of the 18S rRNA gene, internal transcribed spacer (ITS) region including 5.8S rRNA gene and 26S rRNA gene D1/D2 domain. The addition to the clade of new anamorphic species identified among ballistoconidium-forming yeasts isolated from China confirmed and strengthened the separation of this clade from other clades or lineages in the order Tremellales. A new anamorphic genus, Mingxiaea gen. nov. (type species Mingxiaea variabilis comb. nov.) is therefore proposed to accommodate the anamorphic species in the Bulleribasidium clade. Six new combinations are proposed for the described species of this clade which were formerly assigned to the genus Bullera. Four novel species in the new genus were identified among 16 ballistoconidium-forming yeast strains isolated from plant leaves collected in Hainan province, southern China, by D1/D2 and ITS sequence analyses. The novel species are described as Mingxiaea sanyaensis sp. nov. (type strain SY-3.23T =AS 2. 3623T =CBS 11408T), Mingxiaea hainanensis (type strain WZS-8.13T =AS 2.4161T =CBS 11409T), Mingxiaea foliicola (type strain WZS-8.14T =AS 2.3518T =CBS 11407T) and Mingxiaea wuzhishanensis (type strain WZS-29.8T =AS 2.4163T =CBS 11411T).

Effect of Cell Culture on 18S rRNA Gene Sequences in the Cultural Course of Taxus chinensis Cells

2008 ◽  
Vol 63 (1-2) ◽  
pp. 127-132
Author(s):  
Fu Xiang ◽  
Long J. Yu ◽  
Wu Chen ◽  
Zhi Liu
Keyword(s):  
Cell Culture ◽  
Phylogenetic Analysis ◽  
18S Rrna ◽  
Relative Rate ◽  
18S Rrna Gene ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Taxus Chinensis ◽  
Gene Sequences ◽  
Parsimony Method

Cell culture is an effective technology for taxol production. This paper discusses the effect of Taxus cell cultures on the 18S rRNA gene sequences based on the phylogenetic analysis of cultured T. chinensis cells and related species. The phylogenetic tree is reconstructed using the maximum parsimony method and the relative rate test to test the hypothesis of a molecular clock. The phylogenetic analysis indicates that cell culture changes the phylogenetic position of cultured T. chinensis cells. More than that, the 18S rRNA gene of cultured T. chinensis cells has a faster rate of substitution than that of T. chinensis. With T. media as reference, the divergence time of the cultured T. chinensis cells is 7 Ma (million years) more than that of the T. chinensis cells based on the 18S rRNA gene sequences.

Phylogenetic Analysis Based on 18S rRNA Gene and matK Gene Sequences of Panax vietnamensis and Five Related Species

Planta Medica ◽  
2001 ◽  
Vol 67 (5) ◽  
pp. 461-465 ◽  
Author(s):  
Katsuko Komatsu ◽  
Shu Zhu ◽  
Hirotoshi Fushimi ◽  
Tran Kim Qui ◽  
Shaoqing Cai ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Related Species ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Gene Sequences ◽  
Matk Gene

scholarly journals Genetic Diversity of Archaea in Deep-Sea Hydrothermal Vent Environments

Genetics ◽  
1999 ◽  
Vol 152 (4) ◽  
pp. 1285-1297 ◽  
Author(s):  
Ken Takai ◽  
Koki Horikoshi
Keyword(s):  
Genetic Diversity ◽  
Phylogenetic Analysis ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Small Subunit ◽  
Molecular Phylogenetic Analysis ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Rdna Sequencing ◽  
Molecular Phylogenetic

Abstract Molecular phylogenetic analysis of naturally occurring archaeal communities in deep-sea hydrothermal vent environments was carried out by PCR-mediated small subunit rRNA gene (SSU rDNA) sequencing. As determined through partial sequencing of rDNA clones amplified with archaea-specific primers, the archaeal populations in deep-sea hydrothermal vent environments showed a great genetic diversity, and most members of these populations appeared to be uncultivated and unidentified organisms. In the phylogenetic analysis, a number of rDNA sequences obtained from deep-sea hydrothermal vents were placed in deep lineages of the crenarchaeotic phylum prior to the divergence of cultivated thermophilic members of the crenarchaeota or between thermophilic members of the euryarchaeota and members of the methanogen-halophile clade. Whole cell in situ hybridization analysis suggested that some microorganisms of novel phylotypes predicted by molecular phylogenetic analysis were likely present in deep-sea hydrothermal vent environments. These findings expand our view of the genetic diversity of archaea in deep-sea hydrothermal vent environments and of the phylogenetic organization of archaea.

Phylogenetic Analysis and the Evolution of the 18S rRNA Gene Typing System of Acanthamoeba

2015 ◽  
Vol 62 (1) ◽  
pp. 69-84 ◽  
Author(s):  
Paul A. Fuerst ◽  
Gregory C. Booton ◽  
Monica Crary
Keyword(s):  
Phylogenetic Analysis ◽  
18S Rrna ◽  
18S Rrna Gene ◽  
Rrna Gene ◽  
Gene Typing ◽  
Typing System
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