A Phylogenetic Comparison of 18s-Ribosomal Rna Sequences of Lungfish With Those of Other Chordates

1991 ◽  
Vol 39 (5) ◽  
pp. 509 ◽  
Author(s):  
JMP Joss ◽  
N Cramp ◽  
PR Baverstock ◽  
AM Johnson
Keyword(s):  
Phylogenetic Analysis ◽  
Rna Sequencing ◽  
Ribosomal Rna ◽  
Nucleotide Sequences ◽  
Rna Sequences ◽  
18S Ribosomal Rna ◽  
Phylogenetic Comparison ◽  
Ribosomal Rna Sequences ◽  
Sequencing Technique

A rapid RNA-sequencing technique was used to partially sequence the 18S ribosomal RNA of species representing seven taxa: Holocephali, Cladistia, Chondrostei, Holostei, Dipnoi, Anura and Caudata. Phylogenetic analysis of the nucleotide sequences strongly suggests that both the Holocephali and Cladistia, and the Anura and Caudata, are each monophyletic groups. There is a weaker suggestion that the Chondrostei and Holostei are monophyletic. The Dipnoi did not group with any one of these more than with any other.

Phylogenetic Analysis and Rapid Detection of GenusPhellinususing the Nucleotide Sequences of 18S Ribosomal RNA

Mycobiology ◽  
2003 ◽  
Vol 31 (3) ◽  
pp. 133 ◽  
Author(s):  
Byung-Hyouk Nam ◽  
Jae-Yun Lee ◽  
Gi-Young Kim ◽  
Heon-Ho Jung ◽  
Hyung-Sik Park ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Ribosomal Rna ◽  
Rapid Detection ◽  
Nucleotide Sequences ◽  
18S Ribosomal Rna

Phylogenetic analysis of the rumen ciliate family Ophryoscolecidae based on 18S ribosomal RNA sequences, with new sequences fromDiplodinium,Eudiplodinium, andOphryoscolex

1997 ◽  
Vol 75 (6) ◽  
pp. 963-970 ◽  
Author(s):  
André-Denis G. Wright ◽  
Denis H. Lynn
Keyword(s):  
Phylogenetic Analysis ◽  
Ribosomal Rna ◽  
Phylogenetic Relationships ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
Small Subunit ◽  
Base Pairs ◽  
Rna Sequences ◽  
Ribosomal Rna Sequences ◽  
The Family

Phylogenetic relationships within the largest family of entodiniomorphid rumen ciliates, the Ophryoscolecidae, were inferred from comparisons of small-subunit ribosomal RNA gene sequences. These included three new sequences from Diplodinium dentatum (1638 base pairs (bp)), Eudiplodinium maggii (1637 bp), and Ophryoscolex purkynjei (1636 bp). Using morphological characters, Lubinsky constructed a cladogram of the Ophryoscolecidae, and on the basis of his analysis, he divided the family into three subfamilies (Entodiniinae, Diplodiniinae, Ophryoscolecinae) to reflect his "natural" groupings (G. Lubinsky. 1957. Can. J. Zool. 35: 141 – 159). Our cladistic analysis, based on the limited morphological and ultrastructural data available, indicates that there are no synapomorphies supporting the Diplodiniinae sensu Lubinsky. However, based upon the six 18S sequences for the Ophryoscolecidae, the rumen ciliates are monophyletic and fall into three distinct groups corresponding to Lubinsky's subfamilial division of the family. Our molecular analysis shows Entodinium to be the earliest branching rumen ciliate (subfamily Entodiniinae) and Eudiplodinium, not Diplodiium, branching first among the diplodiniines.

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