Genetic effects on tolerance to acute cold stress in red drum, Sciaenops ocellatus L.
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Genetic effects on cold-stress tolerance were assessed for red drum (Sciaenops ocellatus), an economically important sciaenid fish in the southern USA. Thirty-five families were generated via 'natural' spawning of multiple sets of five breeders (three dams x two sires) in individual brood tanks. Offspring from the 35 families were transferred abruptly from an acclimation temperature of ∼24°C to 5.7°C and maintained subsequently at an average temperature of 6.5°C. Offspring were assigned a posteriori to individual broodfish (dam and sire) based on genotypes at nuclear-encoded microsatellites. Heritability of the survival-time probability function was estimated using a proportional hazard approach and an animal-additive model. The estimated heritability was 0.20 (95% CI: 0.07-0.40), indicating a significant genetic component to acute cold-stress tolerance in red drum. © 2008 The Authors.
author list (cited authors)
Saillant, E., Wang, X., Ma, L., Gatlin, D. M., Vega, R. R., & Gold, J. R.