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Citation for Study 1821

Citation title: "Ribosomal DNA pseudogenes are widespread in the eucalypt group (Myrtaceae): implications for phylogenetic analysis".

This study was previously identified under the legacy study ID S1795 (Status: Published).

Citation

Bayly M.J., Udovicic F., Gibbs A., Parra-osorio C., & Ladiges P. 2007. Ribosomal DNA pseudogenes are widespread in the eucalypt group (Myrtaceae): implications for phylogenetic analysis. Cladistics, null.

Authors

• Bayly M.J. +613 8344 5055
• Udovicic F.
• Gibbs A.
• Parra-osorio C.
• Ladiges P.

Abstract

Pseudogenes from the 18S5.8S26S cistron of nuclear ribosomal DNA are reported in the eucalypt group (Myrtaceae), which includes seven genera. Putative pseudogenes are identified by a range of sequence comparisons including: the number of CpG and CpNpG methylation sites, GC content, estimated secondary structure stability of ITS transcripts, the presence of conserved motifs, patterns of sequence relationships and inferred substitution patterns. These comparisons indicate that pseudogenes are widespread, being evident in Eucalyptus (subgenera Eucalyptus and Eudesmia), Corymbia (extracodical sections Rufaria, Ochraria and Blakearia), Angophora, Stockwellia quadrifida and Arillastrum gummiferum. At least six sequences used in previous phylogenetic studies are identified as pseudogenes, and a further 10 pseudogenes are newly sequenced here. Gene trees place pseudogenes in a number of distinct lineages: pseudogenes from Eucalyptus group with other Eucalyptus sequences, those from Corymbia and Angophora group with other Corymbia/Angophora sequences, that from Stockwellia groups with other sequences from the Eucalyptopsis group, and that from Arillastrum is placed as sister to the other included sequence of Arillastrum. Some pseudogenes in Eucalyptus, Corymbia and Angophora represent deep rDNA paralogues that pre-date species differentiation in these groups, and a recombination analysis shows no evidence of recombination between putative pseudogenes and their functional counterparts. The presence of divergent paralogues presents both challenges and opportunities for the reconstruction of eucalypt phylogenies using ribosomal DNA sequences. Phylogenetic datasets should include only orthologous sequences, but different paralogues potentially provide additional, independent, character sets for phylogenetic analyses.

About this resource

• Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S1821
• Other versions: Nexus NeXML
• Show BibTeX reference

  		@ARTICLE{TreeBASE2Ref14690,
  	 author = {Michael James Bayly and Frank  Udovicic and Adele K.  Gibbs and C.  Parra-Osorio and Pauline Y.  Ladiges},
  	 title = {Ribosomal DNA pseudogenes are widespread in the eucalypt group (Myrtaceae): implications for phylogenetic analysis},
  	 year = {2007},
  	 keywords = {},
  	 doi = {},
  	 url = {},
  	 pmid = {},
  	 journal = {Cladistics},
  	 volume = {},
  	 number = {},
  	 pages = {},
  	 abstract = {Pseudogenes from the 18S5.8S26S cistron of nuclear ribosomal DNA are reported in the eucalypt group (Myrtaceae), which includes seven genera. Putative pseudogenes are identified by a range of sequence comparisons including: the number of CpG and CpNpG methylation sites, GC content, estimated secondary structure stability of ITS transcripts, the presence of conserved motifs, patterns of sequence relationships and inferred substitution patterns. These comparisons indicate that pseudogenes are widespread, being evident in Eucalyptus (subgenera Eucalyptus and Eudesmia), Corymbia (extracodical sections Rufaria, Ochraria and Blakearia), Angophora, Stockwellia quadrifida and Arillastrum gummiferum. At least six sequences used in previous phylogenetic studies are identified as pseudogenes, and a further 10 pseudogenes are newly sequenced here. Gene trees place pseudogenes in a number of distinct lineages: pseudogenes from Eucalyptus group with other Eucalyptus sequences, those from Corymbia and Angophora group with other Corymbia/Angophora sequences, that from Stockwellia groups with other sequences from the Eucalyptopsis group, and that from Arillastrum is placed as sister to the other included sequence of Arillastrum. Some pseudogenes in Eucalyptus, Corymbia and Angophora represent deep rDNA paralogues that pre-date species differentiation in these groups, and a recombination analysis shows no evidence of recombination between putative pseudogenes and their functional counterparts. The presence of divergent paralogues presents both challenges and opportunities for the reconstruction of eucalypt phylogenies using ribosomal DNA sequences. Phylogenetic datasets should include only orthologous sequences, but different paralogues potentially provide additional, independent, character sets for phylogenetic analyses.}
  }
  		

• Show RIS reference

  		TY  - JOUR
  ID  - 14690
  AU  - Bayly,Michael James
  AU  - Udovicic,Frank 
  AU  - Gibbs,Adele K. 
  AU  - Parra-Osorio,C. 
  AU  - Ladiges,Pauline Y. 
  T1  - Ribosomal DNA pseudogenes are widespread in the eucalypt group (Myrtaceae): implications for phylogenetic analysis
  PY  - 2007
  KW  - 
  UR  - 
  N2  - Pseudogenes from the 18S5.8S26S cistron of nuclear ribosomal DNA are reported in the eucalypt group (Myrtaceae), which includes seven genera. Putative pseudogenes are identified by a range of sequence comparisons including: the number of CpG and CpNpG methylation sites, GC content, estimated secondary structure stability of ITS transcripts, the presence of conserved motifs, patterns of sequence relationships and inferred substitution patterns. These comparisons indicate that pseudogenes are widespread, being evident in Eucalyptus (subgenera Eucalyptus and Eudesmia), Corymbia (extracodical sections Rufaria, Ochraria and Blakearia), Angophora, Stockwellia quadrifida and Arillastrum gummiferum. At least six sequences used in previous phylogenetic studies are identified as pseudogenes, and a further 10 pseudogenes are newly sequenced here. Gene trees place pseudogenes in a number of distinct lineages: pseudogenes from Eucalyptus group with other Eucalyptus sequences, those from Corymbia and Angophora group with other Corymbia/Angophora sequences, that from Stockwellia groups with other sequences from the Eucalyptopsis group, and that from Arillastrum is placed as sister to the other included sequence of Arillastrum. Some pseudogenes in Eucalyptus, Corymbia and Angophora represent deep rDNA paralogues that pre-date species differentiation in these groups, and a recombination analysis shows no evidence of recombination between putative pseudogenes and their functional counterparts. The presence of divergent paralogues presents both challenges and opportunities for the reconstruction of eucalypt phylogenies using ribosomal DNA sequences. Phylogenetic datasets should include only orthologous sequences, but different paralogues potentially provide additional, independent, character sets for phylogenetic analyses.
  L3  - 
  JF  - Cladistics
  VL  - 
  IS  - 
  ER  -