Genotype-by-environment Interactions for Feed Efficiency Traits in Nellore Cattle Based on Bi-trait Reaction Norm Models

Overview

Journal Genet Sel Evol

Publisher Biomed Central

Specialties Biology
Genetics

Date 2023 Dec 15

PMID 38097941

Authors

Joao B Silva Neto

Lucio F M Mota

Sabrina T Amorim

Elisa Peripolli

Luiz F Brito

Claudio U Magnabosco

Fernando Baldi

Affiliations

Soon will be listed here.

Abstract

Background: Selecting animals for feed efficiency directly impacts the profitability of the beef cattle industry, which contributes to minimizing the environmental footprint of beef production. Genetic and environmental factors influence animal feed efficiency, leading to phenotypic variability when exposed to different environmental conditions (i.e., temperature and nutritional level). Thus, our aim was to assess potential genotype-by-environment (G × E) interactions for dry matter intake (DMI) and residual feed intake (RFI) in Nellore cattle (Bos taurus indicus) based on bi-trait reaction norm models (RN) and evaluate the genetic association between RFI and DMI across different environmental gradient (EG) levels. For this, we used phenotypic information on 12,958 animals (young bulls and heifers) for DMI and RFI recorded during 158 feed efficiency trials.

Results: The heritability estimates for DMI and RFI across EG ranged from 0.26 to 0.54 and from 0.07 to 0.41, respectively. The average genetic correlations (± standard deviation) across EG for DMI and RFI were 0.83 ± 0.19 and 0.81 ± 0.21, respectively, with the lowest genetic correlation estimates observed between extreme EG levels (low vs. high) i.e. 0.22 for RFI and 0.26 for DMI, indicating the presence of G × E interactions. The genetic correlation between RFI and DMI across EG levels decreased as the EG became more favorable and ranged from 0.79 (lowest EG) to 0.52 (highest EG). Based on the estimated breeding values from extreme EG levels (low vs. high), we observed a moderate Spearman correlation of 0.61 (RFI) and 0.55 (DMI) and a selection coincidence of 53.3% and 40.0% for RFI and DMI, respectively.

Conclusions: Our results show evidence of G × E interactions on feed efficiency traits in Nellore cattle, especially in feeding trials with an average daily gain (ADG) that is far from the expected of 1 kg/day, thus increasing reranking of animals.

Citing Articles

Genetic determinism of sensitivity to environmental challenges using daily feed intake records in three lines of pigs.

Tusingwiire T, Garcia-Baccino C, Carillier-Jacquin C, Ligonesche B, Larzul C, Vitezica Z J Anim Sci. 2024; 102.

PMID: 39460976 PMC: 11630856. DOI: 10.1093/jas/skae330.

Genome-wide association study considering genotype-by-environment interaction for productive and reproductive traits using whole-genome sequencing in Nellore cattle.

Carvalho Filho I, Arikawa L, Mota L, Campos G, Fonseca L, Fernandes Junior G BMC Genomics. 2024; 25(1):623.

PMID: 38902640 PMC: 11188527. DOI: 10.1186/s12864-024-10520-x.

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