Genetic parameters of foot-pad dermatitis and body weight in purebred broiler lines in 2 contrasting environments

Poultry Science
D N R G KapellS Avendaño

Abstract

The aims of this study were to investigate the genetic background of foot-pad dermatitis (FPD) in 4 different broiler lines reared in 2 contrasting environments (pedigree or sib-test) and to evaluate the performance of simultaneous genetic selection for improved FPD and BW. Data were available for 4 generations from 4 broiler lines, bred with varying intensities of selection for growth. The average BW ranged from 1.7 to 2.4 kg at 5 wk of age. In the pedigree environment, the prevalence of FPD ranged from 14 to 37%, with 3 to 9% being severely affected; in the sib-test environment, these values were correspondingly 45 to 79% and 35 to 70%. Both traits showed re-ranking of the 4 lines in terms of phenotype across the 2 environments, indicating the existence of a genotype-by-environment interaction. In both environments, females showed higher prevalences of FPD than males. In line with their higher prevalence, heritabilities of FPD in the sib-test environment ranged from 0.22 to 0.32, compared with 0.18 to 0.24 for FPD in the pedigree environment (all SE ≤0.02). Estimates of the genetic correlation between FPD in the pedigree and in the sib-test environments were high (0.78-0.82), which suggests that selection against FPD in a hig...Continue Reading

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Citations

Oct 18, 2015·Poultry Science·Richard A BaileySantiago Avendano
Aug 9, 2016·Veterinary Immunology and Immunopathology·Vanessa L ButlerJudith Hall
Dec 13, 2017·Genetics, Selection, Evolution : GSE·Joanna J IlskaJohn A Woolliams
Oct 18, 2019·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Thinh Tuan ChuJust Jensen
Feb 6, 2017·Genetics, Selection, Evolution : GSE·Mehdi MomenDaniel Gianola
Sep 26, 2020·Frontiers in Physiology·Richard A BaileySantiago Avendano
Nov 15, 2020·Animals : an Open Access Journal From MDPI·Lina GöranssonStefan Gunnarsson
Mar 26, 2021·Poultry Science·Bayode O MakanjuolaRaphael A Mrode

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