Genotype by Environment Interaction for Growth in Atlantic Cod (Gadus morhua L.) in Four Farms of Norway
Genotype by Environment Interaction for Growth in Atlantic Cod (Gadus morhua L.) in Four Farms of Norway
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DOI：
10.3390/jmse3020412
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发表时间：
2015-06-01
影响因子：
2.9
通讯作者：
Mortensen, Atle
中科院分区：
文献类型：
--
作者：
Bangera, Rama;Drangsholt, Tale M. K.;Mortensen, Atle
研究了大西洋鳕（Gadus morhua L.）来自挪威的国家鳕鱼养殖计划。在2007年（YC），一个核心农场（NUC）和两个测试农场（PENorth，PESouth）的13,811条鱼的记录，以及2010年NUC和一个测试农场的9149条鱼的记录。方差和遗传力（h（2））的异方差估计使用单变量动物模型与全同胞（全模型）共同的环境效应。对于每个YC，使用多变量全模型和简化模型（无c（2））估计农场之间的遗传相关性（r（g））。在YC 2007（0.10至0.16）和YC 2010（0.08至0.26）中均观察到h（2）的异源性。对于两个模型，NUC和试验农场之间的r（g）估计值相对较高（0.81 +/- 0.19至0.96 +/- 0.17）和（0.81 +/- 0.08至0.86 +/- 0.04），表明基因型的重新排序较低。PESouth和PENorth之间的基因型强重新排名可能不太重要，因为大多数鳕鱼生产商位于靠近育种核心。总之，NUC和测试农场之间的G x E是低的，目前没有必要单独的养殖计划，体重在鳕鱼。
We studied genotype by environment interaction (G x 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 (h(2)) were estimated using a univariate animal model with environmental effects common to full-sibs (full-model). Genetic correlations (r(g)) between farms were estimated using a multivariate full-model and a reduced-model (without c(2)) for each YC. Heterogeneity of h(2) was observed in both YC 2007 (0.10 to 0.16) and YC 2010 (0.08 to 0.26). The estimates of r(g) 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 x E between NUC and test farms were low and at present there is no need for separate breeding programs for BW in cod.