Polyploidy, the multiplication of entire setsof chromosomes beyond the normal set of two,has occurred extensively, independently, and isoften repeated in many groups of fish, from thesharks to the higher teleosts. While there areseveral ways that a polyploid fish can develop,environmental change and hybrid stabilizationmay play a large role in the initiation of anew polyploid species. Despite its prevalence,the importance of polyploidy in the evolutionof the fishes is unclear. Polyploidy is morecommon in the lower teleosts than the higherteleosts, possibly due to an advantage gainedthrough decreased specialization in the lowerteleosts, a decreased viability of polyploidyin the higher fish, or both. Polyploid fishcould gain an advantage over diploid fishthrough increased heterozygosity, divergence ofduplicate genes, and/or increased expression ofkey physiological proteins. While polyploidfish do not differ considerably from diploidsphenotypically, they may be at a disadvantage,or certain advantages may be lessened due to anoverall decrease in cell number. This papersummarizes all polyploid species of fish knownto-date, and discusses the possible roles andpathways for establishment of polyploidy in theevolution of the fishes.
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Jan 15, 2005
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
All the latest content is available, no embargo periods.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud