TY - JOUR
T1 - A macroevolutionary role for chromosomal fusion and fission in Erebia butterflies
AU - Augustijnen, Hannah
AU - Bätscher, Livio
AU - Cesanek, Martin
AU - Chkhartishvili, Tinatin
AU - Dincă, Vlad
AU - Iankoshvili, Giorgi
AU - Ogawa, Kota
AU - Vila, Roger
AU - Klopfstein, Seraina
AU - de Vos, Jurriaan M.
AU - Lucek, Kay
N1 - Publisher Copyright:
Copyright © 2024 The Authors, some rights reserved.
PY - 2024
Y1 - 2024
N2 - The impact of large-scale chromosomal rearrangements, such as fusions and fissions, on speciation is a longstanding conundrum. We assessed whether bursts of change in chromosome numbers resulting from chromosomal fusion or fission are related to increased speciation rates in Erebia, one of the most species-rich and karyotypically variable butterfly groups. We established a genome-based phylogeny and used state-dependent birth-death models to infer trajectories of karyotype evolution. We demonstrated that rates of anagenetic chromosomal changes (i.e., along phylogenetic branches) exceed cladogenetic changes (i.e., at speciation events), but, when cladogenetic changes occur, they are mostly associated with chromosomal fissions rather than fusions. We found that the relative importance of fusion and fission differs among Erebia clades of different ages and that especially in younger, more karyotypically diverse clades, speciation is more frequently associated with cladogenetic chromosomal changes. Overall, our results imply that chromosomal fusions and fissions have contrasting macroevolutionary roles and that large-scale chromosomal rearrangements are associated with bursts of species diversification.
AB - The impact of large-scale chromosomal rearrangements, such as fusions and fissions, on speciation is a longstanding conundrum. We assessed whether bursts of change in chromosome numbers resulting from chromosomal fusion or fission are related to increased speciation rates in Erebia, one of the most species-rich and karyotypically variable butterfly groups. We established a genome-based phylogeny and used state-dependent birth-death models to infer trajectories of karyotype evolution. We demonstrated that rates of anagenetic chromosomal changes (i.e., along phylogenetic branches) exceed cladogenetic changes (i.e., at speciation events), but, when cladogenetic changes occur, they are mostly associated with chromosomal fissions rather than fusions. We found that the relative importance of fusion and fission differs among Erebia clades of different ages and that especially in younger, more karyotypically diverse clades, speciation is more frequently associated with cladogenetic chromosomal changes. Overall, our results imply that chromosomal fusions and fissions have contrasting macroevolutionary roles and that large-scale chromosomal rearrangements are associated with bursts of species diversification.
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U2 - 10.1126/sciadv.adl0989
DO - 10.1126/sciadv.adl0989
M3 - Article
C2 - 38630820
AN - SCOPUS:85190861964
SN - 2375-2548
VL - 10
JO - Science Advances
JF - Science Advances
IS - 16
M1 - eadl0989
ER -