Literature DB >> 19259456

Ribosomal and Mitochondrial DNA Analyses of Xiphinema americanum-Group Populations.

Stela S Lazarova1, Gaynor Malloch, Claudio M G Oliveira, Judith Hübschen, Roy Neilson.   

Abstract

The 18S ribosomal DNA (rDNA) and cytochrome oxidase I region of mitochondrial DNA (mtDNA) were sequenced for 24 Xiphinema americanum-group populations sourced from a number of geographically disparate locations. Sequences were subjected to phylogenetic analysis and compared. 18S rDNA strongly suggested that only X. pachtaicum, X. simile (two populations) and a X. americanum s.l. population from Portugal were different from the other 20 populations studied, whereas mtDNA indicated some heterogeneity between populations. Phylogenetically, based on mtDNA, an apparent dichotomy existed amongst X. americanum-group populations from North America and those from Asia, South America and Oceania. Analyses of 18S rDNA and mtDNA sequences underpin the classical taxonomic issues of the X. americanum-group and cast doubt on the degree of speciation within the X. americanum-group.

Entities:  

Year:  2006        PMID： 19259456      PMCID： PMC2586466     

Source DB:  PubMed          Journal:  J Nematol        ISSN： 0022-300X            Impact factor:   1.402


  23 in total

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8.  Phylogenetic Relationships Among Xiphinema and Xiphidorus Nematode Species from Brazil Inferred from 18S rDNA Sequences.

Authors:  Claudio M G Oliveira; Judith Hübschen; Derek J F Brown; Luiz C C B Ferraz; Frank Wright; Roy Neilson
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10.  Using mitogenomic and nuclear ribosomal sequence data to investigate the phylogeny of the Xiphinema americanum species complex.

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