RAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas
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AbstractAlthough species from the genus Thunnus include some of the most commercially important and most severely overexploited fishes, the phylogeny of this genus is still unresolved, hampering evolutionary and traceability studies that could help improve conservation and management strategies for these species. Previous attempts based on mitochondrial and nuclear markers were unsuccessful in inferring a congruent and reliable phylogeny, probably due to mitochondrial introgression events and lack of enough phylogenetically informative markers. Here we infer the first genome-wide nuclear marker-based phylogeny of tunas using restriction site associated DNA sequencing (RAD-seq) data. Our results, derived from phylogenomic inferences obtained from 128 nucleotide matrices constructed using alternative data assembly procedures, support a single Thunnus evolutionary history that challenges previous assumptions based on morphological and molecular data.
CitationRAD-seq derived genome-wide nuclear markers resolve the phylogeny of tunas 2016 Molecular Phylogenetics and Evolution
SponsorsWe wish to thank Iñaki Mendibil (AZTI) for excellent technical assistance, Jon Ruiz, Mikel Basterretxea and Iñaki Oyarzabal (AZTI) for collecting samples, and Pete Grewe (CSIRO) for sharing samples. Natalia Díaz-Arce is supported by “Ayudas de formación a jóvenes investigadores y tecnólogos en el entorno científico-tecnológico y empresarial del sector agropesquero y alimentario vasco” (Basque Government). This manuscript is contribution X from the Marine Research Division of AZTI.
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