Robustness scores in fattening pigs estimated from phenotypes measured routinely: definition and genetic parameters

Lenoir, Guillaume; Flatres-Grall, Loïc; Friggens, Nicolas; David, Ingrid

doi:10.5281/zenodo.5572681

Cited by 1 publication

(2 citation statements)

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“…The feed conversion ratio (FCR) was calculated as the ratio between the total FI and the weight gain during the fattening period. A phenotype to characterize the robustness (R2) of the candidates was determined from the visual observation performed during the individual test based on Lenoir et al (2021). The binary trait R2 differentiated animals that were selectable (score 1), from those that were dead or not selectable (score 0).…”

Section: Methodsmentioning

confidence: 99%

“…There is no real consensus on the definition of robustness as well as on the ways to phenotype it. Following the definition of robustness adapted to the context of artificial selection of Knap (2005), we have recently proposed robustness scores estimated from phenotypes commonly available on farm (Lenoir et al, 2021). However, these scores had low heritability indicating the need to find other indicators that can be used for genetic improvement.…”

Section: Introductionmentioning

confidence: 99%

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56. Towards the characterisation of animal robustness by dynamic energy allocation indicators in fattening pigs

Lenoir

Tamayo

Flatres-Grall³

et al. 2022

Proceedings of 12th World Congress on Genetics Applied to Livestock Production (WCGALP)

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The objectives of this study were to investigate the possibility of characterising animal robustness by using indicators based on the dynamics of energy allocation of the animal and to determine their genetic parameters. A total of 2 140 pigs, from the Piétrain NN Français line, were raised at the AXIOM boar testing station. This farm was equipped with automatic feeding system, recording individual weight and feed intake at each visit. We used a dynamic linear regression model to characterize the evolution of the allocation factor (αt) between cumulative net energy available, estimated from feed intake, and cumulative weight gain during fattening period. The variance of αt, that could be interpreted as an indicator of the response of the animal to perturbations/stress, showed moderate heritability (0.27 ±0.08). Our perspective is to further decompose the allocation factor into components to better characterise the robustness phenotype.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%