Investigating Deep Phylogenetic Relationships among Cyanobacteria and Plastids by Small Subunit rRNA Sequence Analysis

Small subunit rRNA sequence data were generated for 27 strains of cyanobacteria and incorporated into a phylogenetic analysis of 1,377 aligned sequence positions from a diverse sampling of 53 cyanobacteria and 10 photosynthetic plastids

SEÁN TURNER; KATHLEEN M. PRYER; VIVIAN P. W. MIAO; JEFFREY D. PALMER

2007

Scholarcy highlights

  • Small subunit rRNA sequence data were generated for 27 strains of cyanobacteria and incorporated into a phylogenetic analysis of 1,377 aligned sequence positions from a diverse sampling of 53 cyanobacteria and 10 photosynthetic plastids
  • Tree inference was carried out using a maximum likelihood method with correction for site-to-site variation in evolutionary rate
  • Confidence in the inferred phylogenetic relationships was determined by construction of a majority-rule consensus tree based on alternative topologies not considered to be statistically significantly different from the optimal tree
  • The results are in agreement with earlier studies in the assignment of individual taxa to specific sequence groups
  • All plastids cluster as a strongly supported monophyletic group arising near the root of the cyanobacterial line of descent

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