Phylogenetic Relationships Among the Sections of Clarkia (Onagraceae) Inferred from the Nucleotide Sequences of PgiC

1996 ◽  
Vol 21 (1) ◽  
pp. 45 ◽  
Author(s):  
L. D. Gottlieb ◽  
V. S. Ford
Keyword(s):  
Phylogenetic Relationships ◽  
Nucleotide Sequences

scholarly journals ANÁLISE DA SIMILARIDADE DE SEQUÊNCIAS GÊNICAS DO ASCORBATO E DO LICOPENO EM ESPÉCIES VEGETAIS CULTIVADAS

2014 ◽  
Vol 6 (4) ◽  
pp. 09-20
Author(s):  
Ana Carolina P Malaman ◽  
Tais Lira Sevilha ◽  
Antonio Fluminhan
Keyword(s):  
Phylogenetic Relationships ◽  
Nucleotide Sequences ◽  
Similarity Matrix ◽  
Antioxidant Action ◽  
Degree Of Similarity

Bioinformatics has made possible the identificationand comparisonof nucleotide sequences responsible for the production of antioxidants compounds in plants by using genomic public accessdatabases and several applicationsable to alignsequencesfrom different species. The present study analyzed the nucleotide sequences ofthe genes for ascorbate and lycopene, known for its antioxidant action, in order to verify which species these substances havealready been identified as well as tocompare them through cladograms, observing the degree of similarity between thespeciesandtheirphylogenetic relationships.It was built the representation of similarity matrix from the genes, which might reflect the evolution of the remaining characters. This report shows the viability of the methodology, and providesa basis for more advanced studies about the phylogenetic relationships among the species

Phylogenetic relationships among species of Calyptogena (Bivalvia: Vesicomyidae) collected around Japan revealed by nucleotide sequences of mitochondrial genes

1995 ◽  
Vol 122 (3) ◽  
pp. 401-407 ◽  
Author(s):  
S. Kojima ◽  
R. Segawa ◽  
T. Kobayashi ◽  
T. Hashimoto ◽  
K. Fujikura ◽  
...  
Keyword(s):  
Phylogenetic Relationships ◽  
Mitochondrial Genes ◽  
Nucleotide Sequences

Comparison of partial 23S rDNA sequences fromRhizobiumspecies

1997 ◽  
Vol 43 (6) ◽  
pp. 526-533 ◽  
Author(s):  
Mesfin Tesfaye ◽  
Daniel J. Petersen ◽  
F. Brian Holl
Keyword(s):  
Phylogenetic Relationships ◽  
Hypervariable Region ◽  
Nucleotide Sequences ◽  
23S Rrna ◽  
Strain Identification ◽  
Secondary Structure Analysis ◽  
16S Rdna Sequence Analysis ◽  
Rdna Sequences ◽  
Product Variation ◽  
Nodulation Specificity

A hypervariable region of Rhizobium 23S rDNA was amplified by polymerase chain reaction and phylogenetic relationships of several strains were determined by comparing nucleotide sequences of the amplified product. Variation in the 23S rDNA nucleotide sequences was consistent with phylogenetic relationships determined by host nodulation specificity and (or) 16S rDNA sequence analysis. Six strains representing three Rhizobium species (R. leguminosarum bv. trifolii, R. meliloti, and R. etli), and two strains each of Bradyrhizobium and Agrobacterium were clustered into five rDNA groups. Unique features identified by secondary structure analysis of the 23S rRNA sequenced region were consistent with the hypothesis that 23S rDNA could be used to design species- or strain-specific Rhizobium probes.Key words: Rhizobium, rDNA, strain identification, phylogeny.

scholarly journals Phylogenetic analysis of the genus Aeromonas based on two housekeeping genes

2004 ◽  
Vol 54 (5) ◽  
pp. 1511-1519 ◽  
Author(s):  
L. Soler ◽  
M. A. Yáñez ◽  
M. R. Chacon ◽  
M. G. Aguilera-Arreola ◽  
V. Catalán ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Phylogenetic Relationships ◽  
Housekeeping Genes ◽  
Nucleotide Sequences ◽  
Aeromonas Salmonicida ◽  
Species Level ◽  
Substitution Rates ◽  
Aeromonas Veronii ◽  
Taxonomic Organization ◽  
Phylogenetic Divergence

The phylogenetic relationships of all known species of the genus Aeromonas, and especially Aeromonas bestiarum and Aeromonas salmonicida, were investigated on 70 strains using the rpoD sequence, which encodes the σ 70 factor. This analysis was complemented with the sequence of gyrB, which has already proven useful for determining the phylogenetic relationships in the genus. Nucleotide sequences of rpoD and gyrB showed that both genes had similar substitution rates (<2 %) and a similar number of variable positions (34 % for rpoD versus 32 % for gyrB). Strain groupings by analysis of rpoD, gyrB and a combination of both genes were consistent with the taxonomic organization of all Aeromonas species described to date. However, the simultaneous analysis of both clocks improved the reliability and the power to differentiate, in particular, closely related taxa. At the inter-species level, gyrB showed a better resolution for differentiating Aeromonas sp. HG11/Aeromonas encheleia and Aeromonas veronii/Aeromonas culicicola/Aeromonas allosaccharophila, while rpoD more clearly differentiated A. salmonicida from A. bestiarum. The analysis of rpoD provided initial evidence for clear phylogenetic divergence between the latter two species.

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