A promising resilience parameter for breeding:the use of weight and feed trajectories in growing pigs  

作　　者：Wim Gorssen Carmen Winters Roel Meyermans Lea Chapard Katrijn Hooyberghs Steven Janssens Abe Huisman Katrijn Peeters Han Mulder Nadine Buys 

机构地区：[1]Center for Animal Breeding and Genetics,Department of Biosystems,KU Leuven,Kasteelpark Arenberg 30–Box 2472,3001 Leuven,Belgium. [2]Laboratory for Biological Psychology,KU Leuven,Tiensestraat 102‑Box 3714,3000 Leuven,Belgium. [3]Hendrix Genetics,P.O.Box 114,5830 AC Boxmeer,The Netherlands. [4]Research Animal Breeding and Genomics,Wageningen University,P.O.Box 338,6700 AH Wageningen,the Netherlands

出　　处：《Journal of Animal Science and Biotechnology》2023年第6期2363-2382,共20页畜牧与生物技术杂志（英文版）

基　　金：This study was partially funded by an FR PhD fellowship(1104320N,WG);two SB PhD fellowships(1S05818N(CW)and 1S37119N(RM))of the Research Foundation Flanders(FWO);Moreover,RM and LC were also partly funded by a KU Leuven C2 project(C24/18/036);KH was funded by the UNIPIG project of VLAIO(HBC.2019.2866).

摘　　要：Background Increasing resilience is a priority in modern pig breeding.Recent research shows that general resilience can be quantified via variability in longitudinal data.The collection of such longitudinal data on weight,feed intake and feeding behaviour in pigs has been facilitated by the development of technologies such as automated feeding stations.The goal of this study was to investigate resilience traits,which were estimated as deviations from longitudinal weight,feed intake and feeding behaviour data during the finishing phase.A dataset with 324,207 records between the age of 95 and 155 days on 5,939 Pietrain pigs with known pedigree and genomic information was used.We provided guidelines for a rigid quality control of longitudinal body weight data,as we found that outliers can significantly affect results.Gompertz growth curve analysis,linear modelling and trajectory analyses were used for quantifying resilience traits.Results To our knowledge,this is the first study comparing resilience traits from longitudinal body weight,feed intake and feeding behaviour data in pigs.We demonstrated that the resilience traits are lowly to moderately heritable for deviations in body weight(h2=2.9%–20.2%),in feed intake(9.4%–23.3%)and in feeding behaviour(16.2%–28.3%).Additionally,these traits have good predictive abilities in cross-validation analyses.Deviations in individual body weight and feed intake trajectories are highly correlated(rg=0.78)with low to moderate favourable genetic correlations with feed conversion ratio(rg=0.39–0.49).Lastly,we showed that some resilience traits,such as the natural logarithm of variances of observed versus predicted body weights(lnvarweight),are more robust to lower observation frequencies and are repeatable over three different time periods of the finishing phase.Conclusions Our results will help future studies investigating resilience traits and resilience-related traits.Moreover,our study provides first results on standardization of quality control and efficient data samp

关 键 词：DEVIATIONS GENETICS Gompertz growth curves HERITABILITY PIGS Predictive ability RESILIENCE Trajectory analysis 

分 类 号：S828[农业科学—畜牧学]