BACKGROUND AND AIMS: Inferring the evolutionary relationships of species and their boundaries is critical in order to understand patterns of diversification and their historical drivers. Despite Abies (Pinaceae) being the second most diverse group of conifers, the evolutionary history of Circum-Mediterranean firs (CMFs) remains under debate. METHODS: We used restriction site-associated DNA sequencing (RAD-seq) on all proposed CMF taxa to investigate their phylogenetic relationships and taxonomic status. KEY RESULTS: Based on thousands of genome-wide single nucleotide polymorphisms (SNPs), we present here the first formal test of species delimitation, and the first fully resolved, complete species tree for CMFs. We discovered that all previously recognized taxa in the Mediterranean should be treated as independent species, with the exception of Abies tazaotana and Abies marocana. An unexpectedly early pulse of speciation in the Oligocene-Miocene boundary is here documented for the group, pre-dating previous hypotheses by millions of years, revealing a complex evolutionary history encompassing both ancient and recent gene flow between distant lineages. CONCLUSIONS: Our phylogenomic results contribute to shed light on conifers' diversification. Our efforts to resolve the CMF phylogenetic relationships help refine their taxonomy and our knowledge of their evolution.
BACKGROUND AND AIMS: Inferring the evolutionary relationships of species and their boundaries is critical in order to understand patterns of diversification and their historical drivers. Despite Abies (Pinaceae) being the second most diverse group of conifers, the evolutionary history of Circum-Mediterranean firs (CMFs) remains under debate. METHODS: We used restriction site-associated DNA sequencing (RAD-seq) on all proposed CMF taxa to investigate their phylogenetic relationships and taxonomic status. KEY RESULTS: Based on thousands of genome-wide single nucleotide polymorphisms (SNPs), we present here the first formal test of species delimitation, and the first fully resolved, complete species tree for CMFs. We discovered that all previously recognized taxa in the Mediterranean should be treated as independent species, with the exception of Abies tazaotana and Abies marocana. An unexpectedly early pulse of speciation in the Oligocene-Miocene boundary is here documented for the group, pre-dating previous hypotheses by millions of years, revealing a complex evolutionary history encompassing both ancient and recent gene flow between distant lineages. CONCLUSIONS: Our phylogenomic results contribute to shed light on conifers' diversification. Our efforts to resolve the CMF phylogenetic relationships help refine their taxonomy and our knowledge of their evolution.
Authors: Jose M Sánchez-Robles; Francisco Balao; Anass Terrab; Juan L García-Castaño; María A Ortiz; Errol Vela; Salvador Talavera Journal: Mol Phylogenet Evol Date: 2014-06-24 Impact factor: 4.286
Authors: Björn Nystedt; Nathaniel R Street; Anna Wetterbom; Andrea Zuccolo; Yao-Cheng Lin; Douglas G Scofield; Francesco Vezzi; Nicolas Delhomme; Stefania Giacomello; Andrey Alexeyenko; Riccardo Vicedomini; Kristoffer Sahlin; Ellen Sherwood; Malin Elfstrand; Lydia Gramzow; Kristina Holmberg; Jimmie Hällman; Olivier Keech; Lisa Klasson; Maxim Koriabine; Melis Kucukoglu; Max Käller; Johannes Luthman; Fredrik Lysholm; Totte Niittylä; Ake Olson; Nemanja Rilakovic; Carol Ritland; Josep A Rosselló; Juliana Sena; Thomas Svensson; Carlos Talavera-López; Günter Theißen; Hannele Tuominen; Kevin Vanneste; Zhi-Qiang Wu; Bo Zhang; Philipp Zerbe; Lars Arvestad; Rishikesh Bhalerao; Joerg Bohlmann; Jean Bousquet; Rosario Garcia Gil; Torgeir R Hvidsten; Pieter de Jong; John MacKay; Michele Morgante; Kermit Ritland; Björn Sundberg; Stacey Lee Thompson; Yves Van de Peer; Björn Andersson; Ove Nilsson; Pär K Ingvarsson; Joakim Lundeberg; Stefan Jansson Journal: Nature Date: 2013-05-22 Impact factor: 49.962
Authors: Simon H Martin; Kanchon K Dasmahapatra; Nicola J Nadeau; Camilo Salazar; James R Walters; Fraser Simpson; Mark Blaxter; Andrea Manica; James Mallet; Chris D Jiggins Journal: Genome Res Date: 2013-09-17 Impact factor: 9.043
Authors: Luwei Wang; Junyi Ding; James S Borrell; Martin Cheek; Hugh A McAllister; Feifei Wang; Lu Liu; Huayu Zhang; Qiufeng Zhang; Yiming Wang; Nian Wang Journal: Ann Bot Date: 2022-03-23 Impact factor: 4.357