Whole-genome duplication shaped cell-type evolution in the vertebrate brain
A study published in Nature reveals that whole-genome duplications (WGDs) were critical in the evolution of vertebrate brain complexity. Researchers found that duplicated genes, or ohnologues, drove cell-type diversification through dosage selection and subfunctionalization.
Why it matters
Understanding the genetic mechanisms behind vertebrate brain evolution provides fundamental insights into biological complexity and the history of vertebrate development.
The complex brains of vertebrates have more cell types than those of their closest relatives. Whole-genome duplications (WGDs) occurred during early vertebrate evolution 1 , but it is unclear whether the duplicated genes (ohnologues) facilitated cell-type evolution. Here using brain single-cell transcriptomes from five chordates—human 2 , mouse 3 , lizard 4 , lamprey 5
Scientific reporting based on peer-reviewed research.
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