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Evaluation of sperm and hormonal assessments in Wagyu, Nellore, and Angus bulls

Published online by Cambridge University Press:  26 July 2023

A. R. Moura ,
A. R. Santos Jr ,
J. D. A. Losano Open the ORCID record for J. D. A. Losano [Opens in a new window] ,
A. F. P. Siqueira ,
T. R. S. Hamilton Open the ORCID record for T. R. S. Hamilton [Opens in a new window] ,
R. Zanella Open the ORCID record for R. Zanella [Opens in a new window] ,
K. C. Caires  and
R. Simões Open the ORCID record for R. Simões [Opens in a new window]
A. R. Moura
Affiliation:
Center for Natural and Human Sciences, Federal University of ABC, Santo André, Sao Paulo, Brazil
A. R. Santos Jr
Affiliation:
Center for Natural and Human Sciences, Federal University of ABC, Santo André, Sao Paulo, Brazil
J. D. A. Losano
Affiliation:
Department of Animal Sciences, University of Florida, USA Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Sao Paulo, Brazil
A. F. P. Siqueira
Affiliation:
Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Sao Paulo, Brazil
T. R. S. Hamilton
Affiliation:
Department of Animal Reproduction, School of Veterinary Medicine and Animal Science, University of Sao Paulo, Sao Paulo, Brazil
R. Zanella
Affiliation:
Escola de Ciências Agrárias Inovação e Negócios, Curso de Medicina Veterinária, Universidade de Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil Programa de Pós Graduação em BioExperimentação, Universidade de Passo Fundo, Passo Fundo, Rio Grande do Sul, Brazil
K. C. Caires
Affiliation:
Department of Human Nutrition, Food and Animal Sciences, University of Hawaii, Manoa, Hawaii, USA
R. Simões*
Affiliation:
Center for Natural and Human Sciences, Federal University of ABC, Santo André, Sao Paulo, Brazil
*
Corresponding author: Renata Simões; Email: renata.simoes@ufabc.edu.br
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Summary

Wagyu bulls are known to have a highly exacerbated libido, as shown by the intense sexual interest of young calves. Therefore we believe that Wagyu male animals have specialized Sertoli and Leydig cells that are directly involved with the sexual precocity in this breed as mature bulls have a small scrotal circumference. This study aimed to evaluate whether there were differences in the hormone and sperm characteristics of Wagyu bulls compared with the same characteristics of subspecies Bos indicus and Bos taurus sires. Frozen–thawed semen from Wagyu, Nellore, and Angus sires were analyzed for sperm kinetics (computer-assisted sperm analysis), plasma membrane integrity, chromatin integrity, acrosome status, mitochondrial activity, lipid peroxidation and hormone [luteinizing hormone (LH) and testosterone] serum concentration. The results showed that Wagyu had lower total motility and an increased number of sperm with no motility when compared with Nellore and Angus bulls. Wagyu breed did not differ from those breeds when considering plasma and acrosome membranes integrity, mitochondrial potential, chromatin resistance, sperm lipid peroxidation or hormone (LH and testosterone) concentrations. We concluded that Wagyu sires had lower total motility when compared with Nellore and Angus bulls. Wagyu breed did not differ from these breeds when considering plasma and acrosome membranes integrity, mitochondrial potential, chromatin resistance, sperm lipid peroxidation, or hormone (LH and testosterone) concentrations.

Keywords

CattleFertilityHormoneSemenSperm traits
Type
Research Article
Information
Zygote , Volume 31 , Issue 5 , October 2023 , pp. 507 - 516
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Copyright
© Federal University of the ABC and the Author(s), 2023. Published by Cambridge University Press

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