Abstract:
:Several attributes intuitively considered to be typical mammalian features, such as complex behavior, live birth and malignant disease such as cancer, also appeared several times independently in lower vertebrates. The genetic mechanisms underlying the evolution of these elaborate traits are poorly understood. The platyfish, X. maculatus, offers a unique model to better understand the molecular biology of such traits. We report here the sequencing of the platyfish genome. Integrating genome assembly with extensive genetic maps identified an unexpected evolutionary stability of chromosomes in fish, in contrast to in mammals. Genes associated with viviparity show signatures of positive selection, identifying new putative functional domains and rare cases of parallel evolution. We also find that genes implicated in cognition show an unexpectedly high rate of duplicate gene retention after the teleost genome duplication event, suggesting a hypothesis for the evolution of the behavioral complexity in fish, which exceeds that found in amphibians and reptiles.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Schartl M,Walter RB,Shen Y,Garcia T,Catchen J,Amores A,Braasch I,Chalopin D,Volff JN,Lesch KP,Bisazza A,Minx P,Hillier L,Wilson RK,Fuerstenberg S,Boore J,Searle S,Postlethwait JH,Warren WCdoi
10.1038/ng.2604subject
Has Abstractpub_date
2013-05-01 00:00:00pages
567-72issue
5eissn
1061-4036issn
1546-1718pii
ng.2604journal_volume
45pub_type
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