Angus sire field fertility and in vitro sperm characteristics following use of different sperm insemination doses in Brazilian beef cattle

Zoca, Saulo Menegatti; Shafii, Bahman; Price, William J.; Utt, M. D.; Harstine, B.R.; McDonald, Kristina; Cruppe, L. H.; DeJarnette, Mel; Peters, L. D.; Vasconcelos, José Luiz Moraes; Dalton, J.C.

doi:10.1016/j.theriogenology.2019.11.021

Cited by 8 publications

(15 citation statements)

References 41 publications

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“…In reference to the CASA variables, it seems that they do not contribute to differentiate seminal quality with a discriminant effect 35 . The differences observed in values of semen parameters for each bull, considering the sanitary status and the evaluations (0 and 30 days), show considerable variability and no clear associations were observed 2 .…”

Section: Discussionmentioning

confidence: 95%

Exploration of semen quality analyzed by casa-mot systems of brahman bulls infected with BLV and BHV-1

Pichardo-Matamoros,

Sevilla,

Elizondo-Salazar

et al. 2023

Sci Rep

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Enzootic bovine leukosis virus (BLV) and bovine herpesvirus 1 (BHV-1) are very important infectious agents for the livestock industry worldwide. The present study aimed to explore the association between natural exposure to BLV and BHV-1 with sperm quality analyzed by Computer-Assisted Semen Analysis (CASA) systems. Ten sexually mature Brahman bulls, with sanitary status BLV+/BHV-1+ (n = 2), BLV−/BHV-1+ (n = 6) and BLV-/BHV-1- (n = 2) were evaluated twice, 30 days apart. Results showed that sanitary status of each bull was not associated with semen quality. It was found that the quality of the semen from the second collection was better due to the interruption of sexual rest. The evidence thus revealed that a bull infected with BLV generated good-quality contaminated semen and, therefore, that it is essential to detect contaminated seminal samples to prevent the spread of BLV. A multivariate analysis showed the presence of four sperm subpopulations in Brahman bulls that differ significantly in their kinematic patterns and with respect to sanitary status (P < 0.05), indicating that infection-free and seronegative bulls present the best kinematic parameters, which improved discrimination of sperm quality according to sanitary status. Overall, the analyses indicate that the seropositive-infected bulls with BLV and BHV-1 should be excluded from beef cattle farms.

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Section: Discussionmentioning

confidence: 95%

Exploration of semen quality analyzed by casa-mot systems of brahman bulls infected with BLV and BHV-1

Pichardo-Matamoros,

Sevilla,

Elizondo-Salazar

et al. 2023

Sci Rep

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“…Its beef nutrients and meat quality occupy an irreplaceable position in the high-end beef market [ 1 ]. Many studies have been carried out on the meat quality traits [ 2 , 3 ], fecundity [ 4 , 5 ], and hybrid utilization [ 6 ] of Angus. In addition, Angus coat color (red and black) is a phenotype that can be directly observed within the breed [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Hereditary Basis of Coat Color and Excellent Feed Conversion Rate of Red Angus Cattle by Next-Generation Sequencing Data

Huang

Wang

et al. 2022

Animals

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Angus cattle have made remarkable contributions to the livestock industry worldwide as a commercial meat-type breed. Some evidence supported that Angus cattle with different coat colors have different feed-to-meat ratios, and the genetic basis of their coat color is inconclusive. Here, genome-wide association study was performed to investigate the genetic divergence of black and red Angus cattle with 63 public genome sequencing data. General linear model analysis was used to identify genomic regions with potential candidate variant/genes that contribute to coat color and feed conversion rate. Results showed that six single nucleotide polymorphisms (SNPs) and two insertion–deletions, which were annotated in five genes (ZCCHC14, ANKRD11, FANCA, MC1R, and LOC532875 [AFG3-like protein 1]), considerably diverged between black and red Angus cattle. The strongest associated loci, namely, missense mutation CHIR18_14705671 (c.296T > C) and frameshift mutation CHIR18_12999497 (c.310G>-), were located in MC1R. Three consecutive strongly associated SNPs were also identified and located in FANCA, which is widely involved in the Fanconi anemia pathway. Several SNPs of highly associated SNPs was notably enriched in ZCCHC14 and ANKRD11, which are related to myofiber growth and muscle development. This study provides a basis for the use of potential genetic markers to be used in future breeding programs to improve cattle selection in terms of coat color and meat phenotype. This study is also helpful to understand the hereditary basis of different coat colors and meat phenotypes. However, the putative candidate genes or markers identified in this study require further investigation to confirm their phenotypic causality and potential effective genetic relationships.

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“…This characteristic has been classified as compensable by Saack et al [9]. Although, Zoca and others [25] evaluated the effect of semen dosage (10, 20 and 40 x 10 6 sperm per dose) from five Angus sires, finding a difference in fertility between sires, but that was not matched with the increase in the dose of sperm. As such, Den Daas et al [68] found no correlation between the maximum number of sperm per dose (17.3 x 10 6 ) and the highest rates of non-return to estrus after 56 d of AI.…”

Section: Discussionmentioning

confidence: 99%

“…As such, Den Daas et al [68] found no correlation between the maximum number of sperm per dose (17.3 x 10 6 ) and the highest rates of non-return to estrus after 56 d of AI. Thus, there is a difference in fertility between sires, being maintained after determining the minimum sperm concentration for each animal to reach the maximum of its fertility [9,25,69].…”

Section: Discussionmentioning

confidence: 99%

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Strategies to predict and minimize differences in field fertility in bulls

Silva¹,

Filho²

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Angus sire field fertility and in vitro sperm characteristics following use of different sperm insemination doses in Brazilian beef cattle

Cited by 8 publications

References 41 publications

Exploration of semen quality analyzed by casa-mot systems of brahman bulls infected with BLV and BHV-1

Exploration of semen quality analyzed by casa-mot systems of brahman bulls infected with BLV and BHV-1

Hereditary Basis of Coat Color and Excellent Feed Conversion Rate of Red Angus Cattle by Next-Generation Sequencing Data

Strategies to predict and minimize differences in field fertility in bulls

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