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Hydroxy-selenomethionine as an organic source of selenium in the diet improves boar reproductive performance in artificial insemination programs
Author(s) -
Ana Paula Pinoti Pavaneli,
Cristian Hernando Garcia Martinez,
Denis Hideki Nakasone,
Ana Carolina Pedrosa,
Maitê Vidal Mendonça,
Simone Maria Massami Kitamura Martins,
Giulia Kiyomi Vechiato Kawai,
Ken Kawaoka Nagai,
Marcílio Nichi,
Garros V Fontinhas-Netto,
Naiara Simarro Fagundes,
Diego Vilela Alkmin,
André Furugen Cesar de Andrade
Publication year - 2021
Publication title -
journal of animal science/journal of animal science ... and asas reference compendium
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 156
eISSN - 1525-3015
pISSN - 0021-8812
DOI - 10.1093/jas/skab320
Subject(s) - semen , selenium , boar , semen quality , sperm , artificial insemination , zoology , litter , insemination , glutathione peroxidase , chemistry , biology , andrology , antioxidant , food science , biochemistry , superoxide dismutase , medicine , botany , pregnancy , agronomy , genetics , organic chemistry
This study aimed to compare different selenium (Se) sources in the diet on boar's semen quality and fertility. For this, 28 boars aged 8 to 28 mo were fed with the following dietary treatments for 95 d: 0.3 mg Se/kg as sodium selenite (SS; n = 14) and 0.3 mg Se/kg as hydroxy-selenomethionine (OH-SeMet; n = 14). During this period, two experiments were carried out. In experiment 1, the semen of all boars was evaluated every 2 wk. Raw semen was initially evaluated for the processing of seminal doses, which were stored at 17 °C for 72 h, followed by sperm quality assessments. Furthermore, Se concentration and glutathione peroxidase (GPx) activity were measured in the seminal plasma. In experiment 2, 728 females were inseminated weekly with seminal doses from boars of the different experimental groups to further assess in vivo fertility and litter characteristics. Results demonstrated that boars fed OH-SeMet had more Se in their seminal plasma (P < 0.05), showing the greater bioavailability of the organic source in the male reproductive system. Moreover, boars fed OH-SeMet tended (P < 0.10) toward a higher total sperm count in the ejaculate (66.60 vs. 56.57 × 109 sperm) and the number of seminal doses (22.11 vs. 18.86; 3 × 109 sperm/dose) when compared with those fed SS. No effect of the dietary treatments was observed on GPx activity in seminal plasma (P > 0.05) as well as on raw and stored semen quality (P > 0.05). Under in vivo conditions, seminal doses from boars fed OH-SeMet tended (P < 0.10) toward a higher pregnancy rate at weeks 3, 5, and 8, and also resulted in a higher (P < 0.05) percentage of pregnant females in the overall period (99.30 vs. 97.00). In conclusion, the replacement of SS with OH-SeMet in boars' diet can improve sperm production and results in better reproductive performance for them, bringing greater productivity and profitability to artificial insemination centers and commercial pig farms.

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