Zebrafish relatives as models for functional comparative genetics and genomics.

Genomic data and genetic tools have established danionin fishes, including zebrafish, as key models for studying phenotypic divergence and evolutionary innovations.

• Why it matters: Understanding the molecular basis of phenotypic differences among closely related species addresses fundamental questions in evolutionary biology and functional genomics.
• What they did: The review discusses the phylogeny, phenotypic traits, and recent genome assemblies of danionins, emphasizing the use of hybridization, mutagenesis, and transgenesis to explore genetic divergence.
• The result: These advances position danionins as valuable models for hypothesis-driven research into evolutionary traits, enabling new insights into genetic mechanisms underlying phenotypic diversity.