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Sequencing of the genus Arabidopsis identifies a complex history of nonbifurcating speciation and abundant trans-specific polymorphism

PY. Novikova, N. Hohmann, V. Nizhynska, T. Tsuchimatsu, J. Ali, G. Muir, A. Guggisberg, T. Paape, K. Schmid, OM. Fedorenko, S. Holm, T. Säll, C. Schlötterer, K. Marhold, A. Widmer, J. Sese, KK. Shimizu, D. Weigel, U. Krämer, MA. Koch, M. Nordborg,

. 2016 ; 48 (9) : 1077-82. [pub] 20160718

Jazyk angličtina Země Spojené státy americké

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc17031577
E-zdroje Online Plný text

NLK ProQuest Central od 2000-01-01 do Před 1 rokem
Health & Medicine (ProQuest) od 2000-01-01 do Před 1 rokem
Public Health Database (ProQuest) od 2000-01-01 do Před 1 rokem

Odkazy

PubMed 27428747
DOI 10.1038/ng.3617
Knihovny.cz E-zdroje

The notion of species as reproductively isolated units related through a bifurcating tree implies that gene trees should generally agree with the species tree and that sister taxa should not share polymorphisms unless they diverged recently and should be equally closely related to outgroups. It is now possible to evaluate this model systematically. We sequenced multiple individuals from 27 described taxa representing the entire Arabidopsis genus. Cluster analysis identified seven groups, corresponding to described species that capture the structure of the genus. However, at the level of gene trees, only the separation of Arabidopsis thaliana from the remaining species was universally supported, and, overall, the amount of shared polymorphism demonstrated that reproductive isolation was considerably more recent than the estimated divergence times. We uncovered multiple cases of past gene flow that contradict a bifurcating species tree. Finally, we showed that the pattern of divergence differs between gene ontologies, suggesting a role for selection.

Citace poskytuje Crossref.org

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