Possible role of a mitochondrial genome rearrangement in maintaining the spatial segregation of two cryptic species of the <i>Lessonia nigrescens</i> species complex

Simple item page
dc.contributor.authorTellier, Florence
dc.contributor.authorFaugeron, Sylvain
dc.contributor.authorValero, Myriam
dc.date.accessioned2025-01-21T00:00:22Z
dc.date.available2025-01-21T00:00:22Z
dc.date.issued2011
dc.description.abstractIn numerous taxa, studies have reported the co-occurrence of several copies for a single mitochondrial marker (heteroplasmy), leading to incorrect phylogenetic inferences if not detected. While this phenomenon has been widely investigated in terrestrial taxa, it remains largely unexplored in marine algae. Here we report the detection of heteroplasmy in the Lessonia nigrescens species complex. This work aimed to identify the distinct fragments and to determine their geographic extent in the distribution range of two kelp species. Using phylogenetic reconstructions of a mitochondria! DNA marker (atp8/trnS intergenic region), we suggest that a duplication event occurred, either with or without transfer of the copy to the nucleus. The corresponding sequences constituted a new monophyletic clade, distinct from those previously described in L. nigrescens, hence discarding the interspecific hybridization and intraspecific biparental transmission hypotheses. The characterization of 652 individuals sampled along 2,500 km of coastline revealed that the duplication was absent in the Northern species, but of high frequency in the northernmost populations of the Southern species. Because the duplication is restricted to the parapatric contact zone between the two species, our findings open new perspectives about the importance of reproductive isolation mechanisms and local adaptation in the origin and persistence of this pattern.
dc.fuente.origenWOS
dc.identifier.issn0007-9723
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95337
dc.identifier.wosidWOS:000296122200003
dc.issue.numero4
dc.language.isoen
dc.pagina.final383
dc.pagina.inicio371
dc.revistaCahiers de biologie marine
dc.rightsacceso restringido
dc.subjectHeteroplasmy
dc.subjectKelp
dc.subjectMitochondria
dc.subjectParapatric distribution
dc.subjectRange edge
dc.subjectSpeciation
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titlePossible role of a mitochondrial genome rearrangement in maintaining the spatial segregation of two cryptic species of the <i>Lessonia nigrescens</i> species complex
dc.typeartículo
dc.volumen52
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas