Genetic variation in resistance to infectious pancreatic necrosis in rainbow trout (Oncorhynchus mykiss) after a challenge test |
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Authors: | Marte Wetten Sissel Kjøglum Kjersti Turid Fjalestad Olaf Skjærvik Arne Storset |
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Institution: | 1. Aqua Gen AS, Pir‐Senteret, Trondheim, Norway;2. VESO Vikan, Vikan, Namsos, Norway |
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Abstract: | In this study, we wanted to evaluate genetic variation in resistance to infectious pancreatic necrosis (IPN) in a breeding population of rainbow trout. Two hundred families were challenged at a commercial test station, using methods that were previously developed for testing resistance to IPN in Atlantic salmon. Thirty‐five days after the challenge the accumulated mortality was 26%. The results show that resistance to IPN is moderately heritable in the tested population (h2=0.30). The genetic correlation between IPN resistance and body weight was found to be low and non‐significant. The significant additive genetic variation found in IPN resistance after a controlled challenge test gives promise for successful breeding for increased resistance to IPN in rainbow trout. |
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Keywords: | genetics IPN rainbow trout variance components |
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