Evidence map›Paper›PMID 39989134›Full record

ArticleJournal of animal science2025

Residual feed intake and reproductive-related parameters in yearling Brangus bulls.

Mauro Venturini, Joao de Agostini Losano, Daniella Heredia, Maria Camila López Duarte, Jose Infante, Federico Podversich, Maura McGraw, Muhammad Sohail Siddique, Jillian Guertin, Brette Poliakiwski and 5 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of animal science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Review
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Mauro VenturiniNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.
Joao de Agostini LosanoDepartment of Animal Sciences, University of Florida, Gainesville, FL, USA.
Daniella HerediaNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.ORCID 0000-0003-1315-743X
Maria Camila López DuarteNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.
Jose InfanteNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.
Federico PodversichNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.
Maura McGrawDepartment of Animal Sciences, University of Florida, Gainesville, FL, USA.
Muhammad Sohail SiddiqueDepartment of Animal Sciences, University of Florida, Gainesville, FL, USA.
Jillian GuertinDepartment of Animal Sciences, University of Florida, Gainesville, FL, USA.
Brette PoliakiwskiDepartment of Animal Science, Texas A&M University, College Station, TX, USA.
Damon J SmithDepartment of Animal Science, Texas A&M University, College Station, TX, USA.
Ky PohlerDepartment of Animal Science, Texas A&M University, College Station, TX, USA.
Nicolas DiLorenzoNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.ORCID 0000-0001-5174-3427
Bradford W DaigneaultDepartment of Animal Sciences, University of Florida, Gainesville, FL, USA.ORCID 0000-0002-8329-4221
Angela Gonella DiazaNorth Florida Research and Education Center, University of Florida, Marianna, FL, USA.ORCID 0000-0001-7446-3831

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Residual feed intake (RFI) is a widely employed metric to estimate feed efficiency, which compares actual feed intake to expected feed intake. Enhancing feed efficiency while maintaining reproductive performance is critical to maximizing the profitability of beef production systems. Published data exhibit conflicting results concerning the impact of RFI on reproductive parameters. Our objective was to evaluate the relationship between RFI and reproductive parameters in young Brangus bulls. Sixty bulls were randomly selected at the beginning of a 56-d feed efficiency test. At the start, scrotal circumference (SC) was measured, blood samples were taken for testosterone concentration analysis, and semen samples were collected by electroejaculation. Fresh semen was visually evaluated for motility, morphology, and plasma membrane integrity. Sperm kinematics and concentration were objectively determined via computer-assisted sperm analysis (CASA-IVOS II System). At the end of the test, bulls were classified as feed efficient (low RFI: LRFI) or feed inefficient (high RFI: HRFI) and grouped based on RFI divergence. Two models were constructed to analyze data: one using all bulls (Halves, n = 58) and one using the 25% extremes of the population (Tails, n = 30). Data were compared using a completely randomized design. Using the halves model, only major defects (P < 0.04) and total defects (P = 0.014) were significantly affected by RFI group, with LRFI bulls showing a lower proportion of abnormal sperm cells. In the tails model, only SC (P = 0.01) was significantly affected by RFI, with LRFI bulls having a larger SC compared to HRFI bulls. The RFI group did not affect CASA-derived traits in either model. In conclusion, most fertility-related measurements were not affected by RFI status in young Brangus bulls. These results suggest that selection for feed efficiency in young bulls can be achieved without negatively impacting seminal characteristics associated with fertility.

Indexed as

EatingReproductionAnimal FeedAnimalsCattleMaleSemen AnalysisSpermatozoaTestosteroneTestosteronebeef bullscomputer-assisted sperm analysesfeed efficiencysemen

Identifiers

PMID39989134
PMCPMC12019964

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.