Genetic correlations between survival of Atlantic salmon in challenge and field tests
Genetic correlations between survival of Atlantic salmon in challenge and field tests
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DOI：
10.1016/s0044-8486(97)00203-2
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发表时间：
1997-12-15
期刊：
影响因子：
4.5
通讯作者：
Gjerde, B
中科院分区：
文献类型：
--
作者：
Gjoen, HM;Refstie, T;Gjerde, B
四个子样本的171个全同胞组的大西洋鲑鱼presmolts（后代的96个公鱼和171织补）进行了测试后的生存与病原菌杀鲑气单胞菌，杀鲑弧菌，鳗弧菌和病毒性疾病传染性鲑鱼贫血症（ISA）的挑战。另一个子样本的123个全同胞组进行了测试，作为postsmolts在海洋试验场（现场测试），感染A。杀鲑剂盛行，在两个月的夏季期间造成高死亡率。使用全同胞组平均MINQUE模型估计每个测试环境中生存的方差和协方差分量。在挑战试验中，A.杀鲑性线虫为0.53（50%存活率），田间试验为0.38（65%存活率）。两种测试中生存率之间的遗传相关性为0.95。因此，以蜕皮前的攻毒试验存活率作为选择标准，对呋喃丹抗性的遗传改良具有良好的前景。结果还表明，对每种细菌性疾病的抗性之间存在正遗传相关，但对病毒性疾病ISA的抗性之间存在弱的负遗传相关。以及对每种细菌疾病的抵抗力。(C)1997年Elsevier Science B.V.
Four sub-samples of 171 full-sib groups of Atlantic salmon presmolts (the offspring of 96 sires and 171 darns) were tested for survival after challenge with the pathogenic bacteria Areomonas salmonicida, Vibrio salmonicida, Vibrio anguillarum and the viral disease Infectious Salmon Anaemia (ISA). Another sub-sample of 123 of the full-sib groups was tested as postsmolts at a marine test-site (field test) where infection with A. salmonicida prevailed causing high mortality during a two-month summer period. A full-sib group mean MINQUE model was used to estimate the variance and covariance components for survival in each test environment. Estimated heritabilities on the underlying liability scale for survival in the challenge test with A. salmonicida was 0.53 (at 50% survival) and in the field test 0.38 (at 65% survival). The genetic correlation between survival in the two tests was 0.95. Thus, the results give good prospects for genetic improvement of resistance to furunculosis when survival data from challenge tests of presmolts are used as the selection criterion. The results also indicate a positive genetic correlation between resistance to each of the bacterial diseases, but a weak negative genetic correlation between resistance to the viral disease ISA. and resistance to each of the bacterial diseases. (C) 1997 Elsevier Science B.V.