Genetic, maternal, and environmental variance components for body weight and length of Atlantic cod at 2 points in life

Journal of Animal Science
J J ToshJ A B Robinson

Abstract

Variance components were estimated for 2 body size traits of Atlantic cod at 2 time points. Wild-caught founders from 3 regions off eastern North America were spawned and their progeny were reared at 2 locations in 2 consecutive years. Full-sib families (n = 148) were kept separate until individuals achieved a size large enough to be tagged. At that time (220 d of age), BW and length of 47,637 offspring from 90 sires and 89 dams were recorded. The juveniles were then transferred to sea cages at 3 sites, where they grew further for more than a year. A second set of measurements was collected on 11,839 fish (634 d of age). Dispersion parameters were estimated using REML in bivariate analyses. Models included fixed degree-days (covariate), year × location subclasses, and genetic groups composed of connected families within region of origin. Random factors were animal (additive genetic effects), considering known relationships among the fish; dam (maternal effects); and family (effects common to full-sibs). At tagging, heritability estimates were small to moderate (0.15 and 0.24 for BW and length, respectively; SE = 0.14), similar to or somewhat larger than the proportions of variation ascribed to dams and families (11 to 16%). Lat...Continue Reading

Citations

Jan 28, 2014·Genetics, Selection, Evolution : GSE·Hanne M NielsenIngrid Olesen
Mar 2, 2011·Journal of Animal Science·J P GutiérrezM A Pérez-Cabal
Oct 29, 2020·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Huimin KangGen Li
Mar 14, 2021·Genetics, Selection, Evolution : GSE·Silvia García-BallesterosIsabel Cervantes
Feb 2, 2011·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Ian Anthony Ernest ButtsIgor Babiak

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