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<p>Avian mtDNA has been used extensively for phylogenetic and phylogeographic studies, and sequencing of complete mitogenomes expands research possibilities. Passerines represent the largest radiation of birds, but among the "New World Suboscines" (infraorder Tyrannides) only 11 complete mitogenomes have been documented to date. Here we described the mitochondrial genomes of <i>Hemitriccus obsoletus</i>, an Atlantic Forest endemic species disjunctly distributed. We obtained mitogenomes as a byproduct of Ultraconserved Elements sequencing. We assembled and annotated the mitogenomes, explored gene order and structure, and also carried out population-level genetic diversity analyses. In addition, we built a phylogenetic tree to infer the relationships of this new mitogenome within the infraorder. Mitogenome size, gene order and structure of both populations of <i>H. obsoletus</i> are similar to other New World Suboscines, including a remaining non-coding control region, which is also present in other Tyrannides. At population-level we found 311 polymorphic sites in protein-coding genes, and a nucleotide divergence of 1.5% considering the entire mitogenome. The phylogenetic tree recovered with high support the monophyly of Rhynchocyclidae. Genetic divergence between allopatric populations warrants additional studies in phylogeography and taxonomy. Our study underscores the importance of expanding mitogenomic documentation across the Tyrannides for insights into different aspects of their evolutionary histories.</p>

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Population-level mitogenomes of Hemitriccus obsoletus (Aves: Rhynchocyclidae), an endemism of a Neotropical biodiversity hotspot

  • 期刊论文

  • 发表日期：

    2025年5月8日

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  • Bruna Peixoto Lovato,
  • Fábio Sarubbi Raposo do Amaral,
  • Ismael Franz

摘要

Avian mtDNA has been used extensively for phylogenetic and phylogeographic studies, and sequencing of complete mitogenomes expands research possibilities. Passerines represent the largest radiation of birds, but among the "New World Suboscines" (infraorder Tyrannides) only 11 complete mitogenomes have been documented to date. Here we described the mitochondrial genomes of Hemitriccus obsoletus, an Atlantic Forest endemic species disjunctly distributed. We obtained mitogenomes as a byproduct of Ultraconserved Elements sequencing. We assembled and annotated the mitogenomes, explored gene order and structure, and also carried out population-level genetic diversity analyses. In addition, we built a phylogenetic tree to infer the relationships of this new mitogenome within the infraorder. Mitogenome size, gene order and structure of both populations of H. obsoletus are similar to other New World Suboscines, including a remaining non-coding control region, which is also present in other Tyrannides. At population-level we found 311 polymorphic sites in protein-coding genes, and a nucleotide divergence of 1.5% considering the entire mitogenome. The phylogenetic tree recovered with high support the monophyly of Rhynchocyclidae. Genetic divergence between allopatric populations warrants additional studies in phylogeography and taxonomy. Our study underscores the importance of expanding mitogenomic documentation across the Tyrannides for insights into different aspects of their evolutionary histories.