Journal
CURRENT OPINION IN GENETICS & DEVELOPMENT
Volume 13, Issue 6, Pages 588-592Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.gde.2003.09.001
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The ray-finned fishes ('fishes') vary widely in genome size, morphology and adaptations. Teleosts, which comprise similar to23,600 species, constitute >99% of living fishes. The radiation of teleosts has been attributed to a genome duplication event, which is proposed to have occurred in an ancient teleost. But more evidence is required to support the genome-duplication hypothesis and to establish a causal relationship between additional genes and teleost diversity. Fish genomes seem to be 'plastic' in comparison with other vertebrate genomes because genetic changes, such as polyploidization, gene duplications, gain of spliceosomal introns and speciation, are more frequent in fishes.
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