FN Archimer Export Format
PT J
TI Multiple independent chromosomal fusions accompanied the radiation of the Antarctic teleost genus Trematomus (Notothenioidei:Nototheniidae)
BT 
AF Auvinet, Juliette
   Graça, Paula
   Dettai, Agnès
   Amores, Angel
   Postlethwait, John H.
   Detrich, H. William
   Ozouf-Costaz, Catherine
   Coriton, Olivier
   Higuet, Dominique
AS 1:1,2,3;2:1,2;3:2;4:4;5:4;6:3;7:1;8:5;9:1,2;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;
C1 Sorbonne Université, CNRS, Université des Antilles, Evolution Paris Seine - Institut de Biologie Paris Seine (EPS - IBPS), 75005, Paris, France
   Institut de Systématique, Evolution, Biodiversité (ISYEB) – Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, Université des Antilles, 43, rue Cuvier, 75231, Paris Cedex 05, France
   Department of Marine and Environmental Sciences, Marine Science Center, Northeastern University, Nahant, MA, 01908, USA
   Institute of Neuroscience, Department of Biology, University of Oregon, Eugene, OR, 97403, USA
   Institut National de Recherche pour l’agriculture, l’alimentation et l’environnement, INRAE, UMR1349 IGEPP, Molecular cytogenetics Platform, BP35327, F-35653, Le Rheu Cedex, France
C2 UNIV SORBONNE, FRANCE
   MNHN, FRANCE
   UNIV NORTHEASTERN, USA
   UNIV OREGON, USA
   INRAE, FRANCE
IN DOAJ
IF 3.26
TC 8
UR https://archimer.ifremer.fr/doc/00615/72731/71831.pdf
   https://archimer.ifremer.fr/doc/00615/72731/71832.pdf
   https://archimer.ifremer.fr/doc/00615/72731/71833.pdf
LA English
DT Article
CR CEAMARC ICOTA 2008
BO L'Astrolabe
DE ;BAC-FISH;Chromosomal painting;Chromosomal rearrangements;Chromosomal structural units;Chromosomal synteny;Nototheniidae;Speciation
AB Background Chromosomal rearrangements are thought to be an important driving force underlying lineage diversification, but their link to speciation continues to be debated. Antarctic teleost fish of the family Nototheniidae (Notothenioidei) diversified in a changing environmental context, which led to ecological, morphological, and genetic differentiation among populations. In addition, extensive chromosomal repatterning accompanied species divergence in several clades. The most striking karyotypic changes involved the recent species radiation (about 10 My) of the genus Trematomus, with chromosomal pair numbers ranging between 29 and 12. These dramatic reductions in chromosome number resulted mostly from large-scale chromosome fusions. Multiple centric and/or tandem fusions have been hypothesized in at least seven of the twelve recognized Trematomus species. To reconstruct their evolutionary history, we employed comparative cytogenomics (BAC-FISH and chromosome painting) to reveal patterns of interspecific chromosomal orthologies across several notothenioid clades. Results We defined orthologous chromosomal segments of reference, termed Structural Units (SUs). SUs were identified in a total of 18 notothenioid species. We demonstrated for the first time that SUs were strongly conserved across every specimen examined, with chromosomal syntenies highlighting a paucity of intrachromosomal macro-rearrangements. Multiple independent fusions of these SUs were inferred in the Trematomus species, in contrast to the shared SU fusions in species of the sister lineage Notothenia. Conclusions The SU segments were defined units of chromosomal rearrangement in the entire family Nototheiidae, which diverged from the other notothenioid families 20 My ago. Some of the identified chromosomal syntenies within the SUs were even conserved in their closest relatives, the family Eleginopsidae. Comparing the timing of acquisition of the fusions in the closely related genera Notothenia and Trematomus of the nototheniid species family, we conclude that they exhibit distinct chromosomal evolutionary histories, which may be relevant to different speciation scenarios. 
PY 2020
PD MAR
SO Bmc Evolutionary Biology
SN 1471-2148
PU Springer Science and Business Media LLC
VL 20
IS 1
UT 000521487600001
DI 10.1186/s12862-020-1600-3
ID 72731
ER

EF