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J. Mar. Sci. Eng. 2015, 3(2), 412-427; doi:10.3390/jmse3020412

Genotype by Environment Interaction for Growth in Atlantic Cod (Gadus morhua L.) in Four Farms of Norway

1
Nofima, P.O. Box 6122, Tromsø NO-9291, Norway
2
Nofima, P.O. Box 5010, Ås NO-1432, Norway
3
Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, P.O. Box 5003, Ås NO-1432, Norway
4
Aqua Gen AS, P.O. BOX 1240, Trondheim N-7462, Norway
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Dean Jerry
Received: 10 February 2015 / Accepted: 26 May 2015 / Published: 3 June 2015
(This article belongs to the Special Issue Genetic Breeding Technology and Its Application in Marine Aquaculture)
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Abstract

We studied genotype by environment interaction (G × E) for body weight (BW) of Atlantic cod (Gadus morhua L.) from the National cod breeding program in Norway. Records of 13,811 fish in a nucleus farm (NUC) and two test farms (PENorth, PESouth) in year-class (YC) 2007, and for 9149 fish in NUC and one test farm in YC 2010 were available. Heterogeneity of variances and heritabilities ( ) were estimated using a univariate animal model with environmental effects common to full-sibs (full-model). Genetic correlations ( ) between farms were estimated using a multivariate full-model and a reduced-model (without ) for each YC. Heterogeneity of was observed in both YC 2007 (0.10 to 0.16) and YC 2010 (0.08 to 0.26). The estimates of between NUC and test farms were relatively high for both models (0.81 ± 0.19 to 0.96 ± 0.17) and (0.81 ± 0.08 to 0.86 ± 0.04), suggesting low re-ranking of genotypes. Strong re-ranking of genotypes between PESouth and PENorth may be less important because most cod producers are situated close to the breeding nucleus. In conclusion, G × E between NUC and test farms were low and at present there is no need for separate breeding programs for BW in cod. View Full-Text
Keywords: Atlantic cod; genotype by environment interaction; heterogeneity of variances; heritability; genetic correlation Atlantic cod; genotype by environment interaction; heterogeneity of variances; heritability; genetic correlation
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MDPI and ACS Style

Bangera, R.; Drangsholt, T.M.K.; Nielsen, H.M.; Sae-Lim, P.; Ødegård, J.; Puvanendran, V.; Hansen, Ø.J.; Mortensen, A. Genotype by Environment Interaction for Growth in Atlantic Cod (Gadus morhua L.) in Four Farms of Norway. J. Mar. Sci. Eng. 2015, 3, 412-427.

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