Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/107928
Title: The Effect of the Deformity Genetic Background of the Breeders on the Spawning Quality of Gilthead Seabream (Sparus aurata L.)
Authors: Lorenzo Felipe, Alvaro 
Shin, Hyun Suk
León-Bernabeu, Sergio
Pérez García, Cathaysa 
Zamorano Serrano, María Jesús 
Pérez-Sánchez, Jaume
Afonso López, Juan Manuel 
UNESCO Clasification: 310902 Genética
310502 Piscicultura
Keywords: Estimated Breeding Value
Gilthead Seabream
Number Of Alive Larvae
Oocyte Yield
Skeletal Deformity, et al
Issue Date: 2021
Journal: Frontiers In Marine Science
Abstract: Fish egg quality is strongly related with the ability of the egg to be fertilized and develop a normal embryo with good survival and a lack of abnormalities. Large variations in the spawning quantity or quality impact directly in the competitiveness and sustainability of hatcheries, which create an overly large broodstock in order to satisfy the on-growing companies’ demand for undeformed fry. The present study reports, for the first time in relation to gilthead seabream, the effect of the genetic background of breeders for presence or absence of deformity on their spawning quality and the importance of considering this when creating broodstock. The spawning quality of crosses of breeders with genetic background for presence or absence of deformity (EBVdef), were evaluated during a whole spawning season, through study of the following traits: oocyte yield, fertilization rate, viability rate, hatching rate, larval survival rate, fertilized eggs, viable eggs, hatched eggs, and number of alive larvae. Breeders with a genetic background for deformity and a normal phenotype had shorter spawning periods, lower oocyte yield and, consequently, produced a lower number of alive larvae. In these two traits, the genetic background of breeders was of greater importance during intermediate spawning periods, when spawning is generally considered optimal for the industry, while environmental factors were more important at the beginning and end of the spawning season. In conclusion, these results demonstrate the importance of controlling the breeders’ genetics when creating broodstock.
URI: http://hdl.handle.net/10553/107928
ISSN: 2296-7745
DOI: 10.3389/fmars.2021.656901
Source: Frontiers in Marine Science[EISSN 2296-7745],v. 8, (Mayo 2021)
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