The amphioxus genome and the evolution of the chordate karyotype
By Nicholas H. Putnam, Thomas W. Butts, D. Ferrier, R. F. Furlong, U. Hellsten, T. Kawashima, Marc Robinson-Rechavi, E. Shoguchi, A. Terry, Jr-Kai Yu and 27 more. Nature, 2008
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Lancelets (‘amphioxus’) are the modern survivors of an ancient chordate lineage, with a fossil record dating back to the Cambrian period. Here we describe the structure and gene content of the highly polymorphic ∼520-megabase genome of the Florida lancelet Branchiostoma floridae, and analyse it in the context of chordate evolution. Whole-genome comparisons illuminate the murky relationships among the three chordate groups (tunicates, lancelets and vertebrates), and allow not only reconstruction of the gene complement of the last common chordate ancestor but also partial reconstruction of its genomic organization, as well as a description of two genome-wide duplications and subsequent reorganizations in the vertebrate lineage. These genome-scale events shaped the vertebrate genome and provided additional genetic variation for exploitation during vertebrate evolution.
Subfields: Genetics, Molecular Biology, Plant Science
View Paper: https://www.semanticscholar.org/paper/5913565101916e23f04f9644837a6afb38d6bf5a
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In Molecular Biology
Citations in the corpus
- Structural and functional diversity of cadherin at the adherens junction (2011, background): “On the other hand, the genome database of the cephalochordate Branchiostoma floridae shows that, in ad dition to Bb1 and Bb2cadherin orthologues, this species has a putative typeIII cadherin (BRAFLDRAFT_201381; Putnam et al., 2008; Hulpiau and van Roy, 2011).”
- Deep whole-genome resequencing sheds light on the distribution and effect of amphioxus SNPs (2022, background): “Previous studies have revealed a contradictory phenomenon that extreme phenotypic similarity and highlevel genetic diversity [2, 3] [7–11] co-exist in amphioxus populations.”
- False teeth: conodont-vertebrate phylogenetic relationships revisited (2010, background): “…of selected tunicates, a lancelet, and vertebrates (i.e. representatives of the three modern chordate groups) supported retention of cephalochordates in the deuterostomes, but basal to tunicates and chordates, with amphioxus (lancelets) as the most basal chordate (Putnam et al. 2008: fi g. 2).”
- Gene duplication and the origins of morphological complexity in pancrustacean eyes, a genomic approach (2010, neutral): “Branchiostoma floridae (lancelet) [87] annotated proteins v1”
- The Amphimedon queenslandica genome and the evolution of animal complexity (2010, neutral): “This is consistent with overall preservation of relict linkages observed here and in other basal metazoan genomes.(22,24,25).”