Journal article
Rainbow trout offspring with different resistance to viral haemorrhagic septicaemia
Technical University of Denmark1
Section of Fish Diseases, Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark2
Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Technical University of Denmark3
National Veterinary Institute, Technical University of Denmark4
To study immunological and immunogenetical parameters related to resistance against viral haemorrhagic septicaemia (VHS), attempts to make gynogenetic strains of rainbow trout selected for high and low resistance to VHS were initiated in 1988. The first gynogenetic generation of inbreeding resulted in the more resistant offspring E8 and the low resistance offspring K3; the K3 offspring having the same high mortality as the susceptible reference strain of outbred trout in infection trials.
A second gynogenetic generation derived from the E8 strain resulted in some low resistance offspring, and two gynogenetic families in which all, or: nearly all, fish survived challenge with VHS virus. In this study, an attempt to associate the distribution of different MHC class II genotypes with low and high resistance gynogenetic offspring was performed.
Two different MHC haplotypes could be distinguished, and in both low and high resistance families all three genotypes were found, which could be explained by the fact that the mother fish carried the heterozygous genotype. Although no significant differences in MHC IE genotypes were found between the high and low resistance offspring, a significantly different distribution of haplotypes in the low resistance offspring was observed, that could not be explained by a one- or two-locus model.
Language: | English |
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Year: | 2001 |
Pages: | 155-167 |
ISSN: | 10959947 and 10504648 |
Types: | Journal article |
DOI: | 10.1006/fsim.2000.0302 |
ORCIDs: | Olesen, Niels Jørgen and Lorenzen, Niels |
MHC Oncorhynchus mykiss disease resistance fish gynogenesis rainbow trout viral haemorrhagic septicaemia
Animals Breeding Female Fish Diseases Genes, MHC Class II Genetic Predisposition to Disease Genotype Haplotypes Male Polymorphism, Restriction Fragment Length Rhabdoviridae Infections Selection, Genetic Spermatozoa rainbow trout, Oncorhynchus mykiss, fish, MHC, viral haemorrhagic septicaemia, disease resistance, gynogenesis