2026-04-17T20:01:20Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/3832025-10-22T11:31:35Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
David, Ingrid
author
Sánchez, Juan‑Pablo
author
Piles, Miriam
other
Producció Animal
group
Genètica i Millora Animal
2025-10-22T11:31:35Z
2025-10-22T11:31:35Z
2018-05-10
David, Ingrid, Juan-Pablo Sánchez, and Miriam Piles. 2018. "Longitudinal Analysis Of Direct And Indirect Effects On Average Daily Gain In Rabbits Using A Structured Antedependence Model". Genetics Selection Evolution 50 (1). Springer Nature. doi:10.1186/s12711-018-0395-9.
0999-193X
http://hdl.handle.net/20.500.12327/383
https://doi.org/10.1186/s12711-018-0395-9
Background: Indirect genetic efects (IGE) are important components of various traits in several species. Although
the intensity of social interactions between partners likely vary over time, very few genetic studies have investigated
how IGE vary over time for traits under selection in livestock species. To overcome this issue, our aim was: (1) to ana‑
lyze longitudinal records of average daily gain (ADG) in rabbits subjected to a 5-week period of feed restriction using
a structured antedependence (SAD) model that includes IGE and (2) to evaluate, by simulation, the response to selec‑
tion when IGE are present and genetic evaluation is based on a SAD model that includes IGE or not.
Results: The direct genetic variance for ADG (g/d) increased from week 1 to 3 [from 8.03 to 13.47 (g/d)2
] and then
decreased [6.20 (g/d)2
at week 5], while the indirect genetic variance decreased from week 1 to 4 [from 0.43 to 0.22
(g/d)2
]. The correlation between the direct genetic efects of diferent weeks was moderate to high (ranging from 0.46
to 0.86) and tended to decrease with time interval between measurements. The same trend was observed for IGE for
weeks 2 to 5 (correlations ranging from 0.62 to 0.91). Estimates of the correlation between IGE of week 1 and IGE of
the other weeks did not follow the same pattern and correlations were lower. Estimates of correlations between direct
and indirect efects were negative at all times. After seven generations of simulated selection, the increase in ADG
from selection on EBV from a SAD model that included IGE was higher (~30%) than when those efects were omitted.
Conclusions: Indirect genetic efects are larger just after mixing animals at weaning than later in the fattening
period, probably because of the establishment of social hierarchy that is generally observed at that time. Accounting
for IGE in the selection criterion maximizes genetic progress.
eng
Attribution 4.0 International
Longitudinal analysis of direct and indirect effects on average daily gain in rabbits using a structured antedependence model
info:eu-repo/semantics/article