|Title||QTL affecting morphometric traits and stress response in the gilthead seabream (Sparus aurata)|
|Publication Type||Journal Article|
|Year of Publication||2011|
|Authors||Boulton, K, Massault C, Houston RD, de Koning DJ, Haley CS, Bovenhuis H, Batargias C, Canario AVM, Kotoulas G, Tsigenopoulos CS|
|Keywords||morphometric traits, QTL, seabream, stress response|
The gilthead seabream (Sparus aurata) is an important aquaculture species that has only been subject to an incipient selective breeding programme. This study, which examined the genetic architecture of seabream morphology and stress response to confinement, takes a step toward the use of marker assisted selection in this species. Major loci affecting these traits were mapped, using data from 460 offspring derived from seven paternal and 73 maternal half-sib families were analysed. Fish were killed following a four-hour confinement experiment to induce stress, after which 15 morphometric measurements were collected and blood was sampled for DNA extraction and plasma cortisol level determination. Heritabilities for the morphometric traits were moderate to high (0.24 – 0.58), with genetic and phenotypic correlations between the traits generally very high. However, the heritability of plasma cortisol level was not significantly different from zero.
Submitted by Costas Tsigenopoulos on Wed, 2012-01-11 12:12