Impact of selection for residual feed intake on breeding soundness and reproductive performance of bulls on pasture-based multisire mating

Journal of Animal Science
Z WangS S Moore

Abstract

There is concern in the beef industry that selecting bulls for feed efficiency based on residual feed intake (RFI) may have a negative impact on bull reproductive performance and fertility. Here we investigated the impact of selection of bulls for low RFI on breeding soundness evaluation (BSE), reproductive performance, and fertility of bulls under natural service in multisire mating groups on pasture. Of the 412 RFI-tested bulls available, 98 (23.8%) were culled for performance, type, temperament, or other reasons, and 88 (21.4%) were culled for failing BSE, for an overall cull rate of 45.1%. From among the 314 bulls subjected to BSE, 32 (10.2%), 20 (6.4%), and 36 (11.4%) were culled for poor feet and legs, scrotal circumference, and semen quality, respectively. The BSE traits were not different (P > 0.10) between bulls categorized as either inefficient (+RFI) or efficient (-RFI), but the proportion of bulls that failed to meet the 60% minimum sperm motility requirement tended (P = 0.07) to be greater in the -RFI group than in the +RFI group (10.2% vs. 4.4%, respectively). In a subpopulation of 115 bulls, individual progressive sperm motility was greater (P < 0.05) in +RFI (85%) than -RFI (80%) bulls. A multisire natural matin...Continue Reading

References

Dec 1, 1993·Journal of Animal Science·B W KennedyT H Meuwissen
Nov 30, 2010·Journal of Animal Science·K S ShafferE E D Felton

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Citations

Nov 1, 2013·Tropical Animal Health and Production·Leilson Rocha BezerraWagner Martins Fontes do Rêgo
Nov 19, 2013·Genome Génome / Conseil National De Recherches Canada·Jagjit S Ludu, Graham S Plastow
Feb 6, 2013·Acta Veterinaria Scandinavica·Yuri MontanholiStephen Miller
Sep 10, 2015·Animal : an International Journal of Animal Bioscience·A B P FontouraS P Miller
May 22, 2018·Animal : an International Journal of Animal Bioscience·D A KennyM McGee
Jul 10, 2018·Journal of Animal Science·Rubens J Ferreira JúniorMaria Eugênia Z Mercadante
Jul 23, 2019·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Giovanna Faria MoraesIdalmo Garcia Pereira
Aug 8, 2020·Ecology and Evolution·Shi-Yi ChenWei Wang

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