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Animals
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Research Advances in Pig Reproduction
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Research Advances in Pig Reproduction

A special issue of Animals (ISSN 2076-2615). This special issue belongs to the section "Pigs".

Deadline for manuscript submissions: 28 February 2025 | Viewed by 4020

Special Issue Editors

Dr. Agata Żmijewska

E-Mail Website
Guest Editor
Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
Interests: pig; reproduction; uterus; ovary; pituitary; endometrium; myometrium; oviduct; pregnancy; omics techniques; in vitro culture
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Grzegorz Panasiewicz

E-Mail Website
Guest Editor
Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
Interests: pig; reproduction; pregnancy; placenta; omics techniques; physiology; in vitro and in vivo studies; omics techniques
Dr. Aleksandra Kurzyńska

E-Mail Website
Guest Editor
Department of Animal Anatomy and Physiology, Faculty of Biology and Biotechnology, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
Interests: pig; female reproduction; physiology; endocrinology; endocrine disruptors; immunology; in vitro and in vivo studies; omics techniques

Special Issue Information

Dear Colleagues,

Pork production makes an important contribution to the global food industry. Efficient pork production depends on optimal reproductive processes in both female and male animals. Moreover, despite interspecies differences, pigs are a recognized model organism widely used in biomedical research. Therefore, studies conducted on pigs can provide much information about the molecular events accompanying reproduction in mammals, including humans, and can be useful for further diagnoses and designs of therapeutic treatments of reproductive disorders.

We are pleased to invite you to publish an original paper or review in this Special Issue that addresses advances in scientific or breeding research in pig reproduction. The Special Issue will include papers from the frontier of reproductive physiology and pathophysiology, endocrinology, immunology concerning molecular mechanisms, and bioengineering or treatment. The current global trend is to focus on the molecular basis of reproduction, with comprehensive multi-omic and functional analyses to support efficient reproduction in sows and boars.

We look forward to your contributions and to sharing your recent findings through this Special Issue.

Dr. Agata Żmijewska
Prof. Dr. Grzegorz Panasiewicz
Dr. Aleksandra Kurzyńska
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Animals is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • pig
  • reproduction
  • advanced technologies
  • reproductive tract
  • artificial reproductive techniques
  • sow
  • boar
  • omics techniques
  • bioengineering

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Published Papers (3 papers)

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15 pages, 1358 KiB  
Article
Effect of Two Different Sperm Selection Methods on Boar Sperm Parameters and In Vitro Fertilisation Outcomes
by Maria Serrano-Albal, Marie Claire Aquilina, Lucas G. Kiazim, Louisa J. Zak, Darren K. Griffin and Peter J. Ellis
Animals 2024, 14(17), 2544; https://doi.org/10.3390/ani14172544 - 1 Sep 2024
Viewed by 761
Abstract
Porcine in vitro embryo production (IVP) protocols have conventionally used density gradient selection (DGS) by centrifugation to prepare sperm samples and achieve successful fertilisation. However, the possible toxicity of the solutions used and the potential damage caused by the centrifugation step may have [...] Read more.
Porcine in vitro embryo production (IVP) protocols have conventionally used density gradient selection (DGS) by centrifugation to prepare sperm samples and achieve successful fertilisation. However, the possible toxicity of the solutions used and the potential damage caused by the centrifugation step may have a negative effect on the quality of the sample. Microfluidic chip-based sperm (MCS) sorting has been proposed as an alternative technique for the selection of high-quality sperm with the purpose of improving reproductive outcomes in IVF. This device does not require centrifugation or any toxic solution to prepare the sample for fertilisation. The sample is not subjected to unnecessary stress, and the process is less operator-dependent. In this study, we compared the sperm parameters of unselected extender-diluted boar semen samples with selected samples using DGS and MCS methods. The results show an expected reduction in sperm concentration after both methods. All the groups were significantly different from one another, with MCS being the group with the lowest concentration. Though the three groups had a similar overall motility, significant differences were found in progressive motility when comparing the unselected group (control, 19.5 ± 1.4%) with DGS and MCS. Progressive motility in DGS was also significantly higher than in MCS (65.2 ± 4.9% and 45.7% ± 5.3, respectively). However, MCS selection resulted in enriched sperm samples with a significantly lower proportion of morphologically abnormal sperm compared to DGS. After fertilisation, no statistical differences were found between the two methods for embryological parameters such as cleavage rates, blastulation rates, and embryo quality. The number of cells in blastocysts derived from MCS was significantly greater than those derived from DGS sperm. Thus, we demonstrate that MCS is at least as good as the standard DGS for most measures. As a more gentle and reproducible approach for sperm selection, however, it could improve consistency and improve IVP outcomes as mediated by a greater proportion of morphologically normal sperm and manifested by a higher cell count in blastocysts. Full article
(This article belongs to the Special Issue Research Advances in Pig Reproduction)
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18 pages, 2649 KiB  
Article
Boar Seminal Microbiota in Relation to Sperm Quality under Tropical Environments
by CongBang Ngo, Junpen Suwimonteerabutr, Prasert Apiwatsiri, Imporn Saenkankam, Nuvee Prapasarakul, Jane M. Morrell and Padet Tummaruk
Animals 2023, 13(24), 3837; https://doi.org/10.3390/ani13243837 - 13 Dec 2023
Cited by 2 | Viewed by 1280
Abstract
The present study was carried out to determine the seminal microbiota of boars and their correlation with sperm quality. A total of 17 ejaculates were collected from 17 Duroc boars and were classified according to sperm quality into two groups: low-quality (n [...] Read more.
The present study was carried out to determine the seminal microbiota of boars and their correlation with sperm quality. A total of 17 ejaculates were collected from 17 Duroc boars and were classified according to sperm quality into two groups: low-quality (n = 8) and high-quality (n = 9). Each ejaculate was subjected to (i) semen evaluation, (ii) bacterial culture and MALDI-TOF identification, and (iii) 16S rRNA gene sequencing and bioinformatic analyses. No difference in the total bacterial count, alpha diversity, and beta diversity between the high-quality group and the low-quality group was detected (p > 0.05). While Globicatella sanguinis was negatively correlated with sperm quality (p < 0.05), Delftia acidovorans was positively correlated with sperm quality (p < 0.05). Lactobacillales (25.2%; LB) and Enterobacterales (10.3%; EB) were the most dominant bacteria and negatively correlated: EB = 507.3 − 0.5 × LB, R2 = 0.24, p < 0.001. Moreover, the abundance of Escherichia-shigella was negatively correlated with LB (r = −0.754, p < 0.001) and positively correlated with Proteus (r = 0.533, p < 0.05). Alysiella was positively correlated with Lactobacillus (r = 0.485, p < 0.05), Prevotella (r = 0.622, p < 0.01), and Staphylococcus (r = 0.489, p < 0.05). In conclusion, seminal microbiota is significantly associated with boar semen qualities. The distributions of the most dominant bacterial genera, the differences in the abundance of small subset microbes, and their correlation appear to have far more impact than the overall seminal bacterial content (e.g., total bacterial count, alpha diversity, and beta diversity) on sperm quality. Full article
(This article belongs to the Special Issue Research Advances in Pig Reproduction)
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Other

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8 pages, 2887 KiB  
Brief Report
Epidemiology and Genetic Characterization of Porcine Parvovirus 7 Recovered from Swine in Hunan, China
by Dongliang Wang, Qing He, Naidong Wang and Jinhui Mai
Animals 2024, 14(15), 2222; https://doi.org/10.3390/ani14152222 - 31 Jul 2024
Viewed by 649
Abstract
Porcine parvovirus 7 (PPV7) was first discovered in swine in 2016, and PPV7 infection has been detected in aborted pig fetuses and in sows that experienced reproductive failure. The objective of this study was to report the prevalence and genetic characterization of PPV7 [...] Read more.
Porcine parvovirus 7 (PPV7) was first discovered in swine in 2016, and PPV7 infection has been detected in aborted pig fetuses and in sows that experienced reproductive failure. The objective of this study was to report the prevalence and genetic characterization of PPV7 in Hunan, China. Seventy of the four hundred and twenty-two (16.6%) serum, semen, and tissue samples collected from pigs were positive for PPV7. One complete PPV7 strain and eighteen complete cap gene sequences were obtained; nucleotide and amino acid identity among the nineteen Cap sequences were 88.1–99.4% and 88.1–100%, respectively. They shared identity with previously discovered sequences ranging from 86.6 to 98.9% and 83.7 to 99.8% at the nucleotide- and amino acid-level, respectively. The phylogenetic tree analysis exhibited that PPV7 strains had two major groups based on the presence or absence of five amino acid (181–185) insertions on the Cap protein. Analysis of the Cap protein demonstrated that PPV7 Cap had significant variability, implying that PPV7 evolved at high substitution rates. Substantial variations of that PPV7 Cap may enable the emergence of newly mutated capsid profiles due to its viral adaptation to host responses. Furthermore, antigenic alteration owing to PPV7 Cap protein amino acid mutations at immune epitopes may enable viruses to escape from the host’s immune system. This study determined the prevalence and genetic characteristics of PPV7 circulating in swine in Hunan, China, and provided the impetus and basis to further investigate the pathogenicity and epidemiology of PPV7. Full article
(This article belongs to the Special Issue Research Advances in Pig Reproduction)
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