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Title

Genetic divergence and assortative mating between colour morphs of the sea urchin Paracentrotus gaimardi

AuthorsCalderón, I.; Ventura, C. R. R.; Turon, Xavier CSIC ORCID ; Lessios, H. A.
KeywordsParacentrotus
Assortative mating
Bindin
Colour polymorphism
Histone
Mitochondrial ATPase
Issue Date2010
PublisherWiley-Blackwell
CitationMolecular Ecology 19 : 484-493 (2010)
AbstractSome species of sea urchins feature large variation in pigmentation. This variability may be the result of phenotypic plasticity or it may be associated with genetic divergence between morphs. Paracentrotus gaimardi exhibits five colour morphs (pink, brown, green, grey and black), which often occur side by side on the same rock. We studied genetic divergence between these morphs in three populations on the coast of Brazil. A fragment of the region encoding the mitochondrial ATPase 8 and 6 mitochondrial genes, a fragment of the intron of a nuclear histone and the entire nuclear gene coding for the sperm protein bindin were analysed. Mitochondrial DNA was differentiated between the pink and all other morphs, but the histone intron was similar in all colour morphs. In bindin, nine codons were found to be under positive selection and significant differences of allelic frequencies were observed in almost all pairwise comparisons between colour morphs. Although the molecular differentiation in bindin is not large enough to suggest reproductive isolation, some degree of assortative mating within morphs seems to be occurring in this species.
Description10 Páginas ; 8 Tablas ; 1 Figura
Publisher version (URL)http://dx.doi.org/10.1111/j.1365-294X.2009.04506.x
URIhttp://hdl.handle.net/10261/38781
DOI10.1111/j.1365-294X.2009.04506.x
ISSN0962-1083
Appears in Collections:(CEAB) Artículos




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