Maqola

Distinguishing species

Tobias MüllerDepartment of Bioinformatics, Biocenter, University of Würzburg, Germany. [email protected]Nicole PhilippiDepartment of Bioinformatics, Biocenter, University of Würzburg, Am Hubland, D-97074 Würzburg, GermanyThomas DandekarDepartment of Bioinformatics, Biocenter, University of Würzburg, Am Hubland, D-97074 Würzburg, GermanyJörg SchultzDepartment of Bioinformatics, Biocenter, University of Würzburg, Am Hubland, D-97074 Würzburg, GermanyMatthias WolfDepartment of Bioinformatics, Biocenter, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany

2007en

ABI

Annotatsiya

Given two organisms, how can one distinguish whether they belong to the same species or not? This might be straightforward for two divergent organisms, but can be extremely difficult and laborious for closely related ones. A molecular marker giving a clear distinction would therefore be of immense benefit. The internal transcribed spacer 2 (ITS2) has been widely used for low-level phylogenetic analyses. Case studies revealed that a compensatory base change (CBC) in the helix II or helix III ITS2 secondary structure between two organisms correlated with sexual incompatibility. We analyzed more than 1300 closely related species to test whether this correlation is generally applicable. In 93%, where a CBC was found between organisms classified within the same genus, they belong to different species. Thus, a CBC in an ITS2 sequence-structure alignment is a sufficient condition to distinguish even closely related species.

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Identifikatorlar

DOI: 10.1261/rna.617107

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