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1 September 2004 Phylogenetic Analysis of the Sigma 2 Protein Gene of Turkey Reoviruses
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Abstract

The open reading frame of the S3 segment encoding the σ2 protein of four turkey reovirus field isolates was analyzed for sequence heterogeneity. The turkey reoviruses we present here have a 97% amino acid identity to turkey NC 98. The S3 nucleotide and amino acid sequence similarity was ≤61% and 78%–80%, respectively, when compared to the chicken reovirus isolates. Comparison of amino acid sequences from chickens and turkeys with that of a duck isolate revealed a 53% and 55% similarity, respectively. Phylogenetic analyses, based on both nucleotide and amino acid sequence, resulted in three major groups among the avian reoviruses; these groups were clearly separated by species. The results of this study provide further evidence, based on the deduced σ2 sequence, that turkey reoviruses form a distinct, separate group relative to chicken and duck isolates. In addition, as a result of the limited sequence identity with their avian counterparts, turkey reoviruses could potentially be considered a separate virus species within subgroup 2 of the Orthoreovirus genus.

Holly S. Sellers, Erich G. Linnemann, Lorena Pereira, and Darrell R. Kapczynski "Phylogenetic Analysis of the Sigma 2 Protein Gene of Turkey Reoviruses," Avian Diseases 48(3), 651-657, (1 September 2004). https://doi.org/10.1637/7181-032304R
Received: 23 March 2004; Accepted: 1 May 2004; Published: 1 September 2004
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