Estimation of genetic parameters for growth and carcass traits in turbot (<i>Scophthalmus maximus</i>)

Abstract

Information on phenotypic and genetic (co)variance for production traits in turbot is required to improve breeding programs. So far, information on morphometric growth traits is sparse and completely lacking on quality carcass traits like fillet weight or fillet yield for turbot. As part of a long-term study we explored the phenotypic and genetic (co)variance of 16 biometrical and carcass traits of three different European turbot strains. Fish were reared under commercial grow-out conditions, including size grading. We used molecular relatedness (MR) methods based on genotyping with 96 microsatellite markers and animal models. We included an adapted condition factor for Pleuronectiformes (FCIPLN) and average daily weight gain (ADG) between the ages of 300 and 500 d post-hatch (dph) for their potential correlation with body weight at harvest. Heritability estimates for all traits were low to medium (0.04–0.29) when strains were jointly analyzed. Separate analysis of strains yielded higher heritability estimates (0.12–0.43). Genetic correlations between weight-related traits were highly positive (0.70–0.99), while runs with yield and ratio traits often resulted in unreliable estimates of genetic correlation due to high standard errors. Body weight (hnormal2=0.19), fillet yield (hnormal2=0.15), and dressing percentage (hnormal2=0.17) are particularly promising selection traits for turbot breeding.

Influence of Genetic Selection for Growth and Broodstock Diet n-3 LC-PUFA Levels on Reproductive Performance of Gilthead Seabream, Sparus aurata

“…Broodstock selection in fish has been based on somatic growth [ 5 ], feed efficiency [ 6 ], disease resistance [ 7 ], deformities [ 8 , 9 ], fillet yield [ 10 , 11 , 12 ] or fillet fatty acid composition [ 13 , 14 ]. Selective breeding programs in gilthead seabream have also addressed improved growth performance, disease resistance and carcass quality [ 15 ].…”

Virulence, Resistance, and Genomic Fingerprint Traits ofVibrio choleraeIsolated from 12 Species of Aquatic Products in Shanghai, China

“…For instance, Scophthalmus maximus (known as turbot) is one of the most important economic marine flatfish species in Europe, which was introduced to China in the 1990s, and its production reached 640,000 tons in 2013 in China. 28 Among crustaceans, the largest output was yielded from Penaeus vannamei with 1,672,287 tons in 2017 in China. 29 In addition, Ostrea gigas thunberg is the world's widely cultured shellfish, and its production reached 4,879,422 tons in 2017 in China.…”

Effects of dietary plant and animal protein sources and replacement levels on growth and feed performance and nutritional status of market-sized turbot (Scophthalmus maximus) in RAS

“…The HSI of the turbot in this study were on the lower range of compared to other studies (Dietz et al, 2012;Bonaldo et al, 2015;Nagel et al, 2017) it can be considered as normal. The in general lower HSI might be attributed to the French strain used in this study, as similar to growth turbot strains from France exhibit lower BW and lower HSI compared to strains from other countries such as Norway (Schlicht et al, 2019), Great Britain (Arfsten et al, 2010) and Iceland (Imsland et al, 2001). Positively correlated to the HSI is the hepatic glycogen as it is stored in the liver as an energy reserve and therefore influences the liver weight (Hemre et al, 2002).…”