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A genetic linkage map of the hermaphrodite teleost fish Sparus aurata L.
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Orientador(es)
Resumo(s)
The gilthead sea bream (Sparus aurata L.) is a marine fish of great importance for fisheries and aquaculture.
It has also a peculiar sex-determination system, being a protandrous hermaphrodite. Here we
report the construction of a first-generation genetic linkage map for S. aurata, based on 204 microsatellite
markers. Twenty-six linkage groups (LG) were found. The total map length was 1241.9 cM. The ratio
between sex-specific map lengths was 1:1.2 (male:female). Comparison with a preliminary radiation hybrid
(RH) map reveals a good concordance, as all markers located in a single LG are located in a single RH
group, except for Ad-25 and CId-31. Comparison with the Tetraodon nigroviridis genome revealed a considerable
number of evolutionary conserved regions (ECRs) between the two species. The mean size of
ECRs was 182 bp (sequence identity 60–90%). Forty-one ECRs have a known chromosomal location in the
pufferfish genome. Despite the limited number of anchoring points, significant syntenic relationships were
found. The linkage map presented here provides a robust comparative framework for QTL analysis in S.
aurata and is a step toward the identification of genetic loci involved both in the determination of economically
important traits and in the individual timing of sex reversal.
Descrição
Palavras-chave
Fish Sparus aurata Hermaphrodite
Contexto Educativo
Citação
Rafaella Franch, Bruno Louro, Matina Tsalavouta, Dimitris Chatziplis, Costas S. Tsigenopoulos, Elena Sarropoulou, Jenny Antonello, Andonis Magoulas, Constantinos C. Mylonas, Massimiliano Babbucci, Tomaso Patarnello, Deborah M. Power, Giorgos Kotoulas, and Luca Bargelloni, "A Genetic Linkage Map of the Hermaphrodite Teleost Fish Sparus aurata L." in Genetics, Oct 2006; 174(2): 851–861.
Editora
Genetics Society of America