Short-term storage of semen samples in acidic extender increases the proportion of females in pigs

Abstract Background Sex preselection is a desired goal of the animal industry to improve production efficiency, depending on industry demand. In the porcine industry, there is a general preference for pork from female and surgically castrated male pigs. Therefore, the birth of more females than male...

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Autores principales:	Yoo-Jin Park, Dong-Ha Shin, Won-Ki Pang, Do-Yeal Ryu, Md Saidur Rahman, Elikanah Olusayo Adegoke, Myung-Geol Pang
Formato:	article
Lenguaje:	EN
Publicado:	BMC 2021
Materias:	Artificial insemination Boar spermatozoa Acidic semen extender Sex ratio Sex preselection Veterinary medicine SF600-1100
Acceso en línea:	https://doaj.org/article/5d8a7cc5bd284a3e90045eb1c49494e0
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spelling	oai:doaj.org-article:5d8a7cc5bd284a3e90045eb1c49494e02021-11-28T12:22:35ZShort-term storage of semen samples in acidic extender increases the proportion of females in pigs10.1186/s12917-021-03078-31746-6148https://doaj.org/article/5d8a7cc5bd284a3e90045eb1c49494e02021-11-01T00:00:00Zhttps://doi.org/10.1186/s12917-021-03078-3https://doaj.org/toc/1746-6148Abstract Background Sex preselection is a desired goal of the animal industry to improve production efficiency, depending on industry demand. In the porcine industry, there is a general preference for pork from female and surgically castrated male pigs. Therefore, the birth of more females than males in a litter leads to economic benefits and improved animal welfare in the pig production industry. Our previous study suggested that the porcine semen extender (BTS) adjusted to pH 6.2 maximises the differences in viability between X-chromosome-bearing (X) spermatozoa and Y-chromosome-bearing (Y) spermatozoa without affecting sperm’s functional parameters. In this study we aimed to evaluate whether the pH 6.2 extender is applicable at the farm level for increasing the number of female piglets without a decline in spermatozoa fertility. Artificial insemination (AI) was carried out with spermatozoa stored at pH 6.2 and pH 7.2 (original BTS) at day 1 and day 2 of storage. Next, the functional parameters of the spermatozoa, litter size, farrowing rate, and female-to-male ratio of offspring were determined. Results Although sperm motility decreased significantly after 2 d of storage, the viability of spermatozoa was preserved at pH 6.2 for 3 d. There was no significant difference in the farrowing rate and average litter size between the group inseminated with the spermatozoa stored in (pH 7.2) and that inseminated with spermatozoa stored in acidic BTS. The percentage of female piglets was approximately 1.5-fold higher in sows inseminated on day 1 in the pH 6.2 than in the pH 7.2 group. Furthermore, although there was no significant difference in the female-to-male ratio, the percentage of female piglets born was slightly higher in the pH 6.2 group than in the pH 7.2 group on day 2. Conclusions The method optimised in our study is simple, economical, and may enhance the number of female births without any decline in spermatozoa fertility.Yoo-Jin ParkDong-Ha ShinWon-Ki PangDo-Yeal RyuMd Saidur RahmanElikanah Olusayo AdegokeMyung-Geol PangBMCarticleArtificial inseminationBoar spermatozoaAcidic semen extenderSex ratioSex preselectionVeterinary medicineSF600-1100ENBMC Veterinary Research, Vol 17, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Artificial insemination Boar spermatozoa Acidic semen extender Sex ratio Sex preselection Veterinary medicine SF600-1100
spellingShingle	Artificial insemination Boar spermatozoa Acidic semen extender Sex ratio Sex preselection Veterinary medicine SF600-1100 Yoo-Jin Park Dong-Ha Shin Won-Ki Pang Do-Yeal Ryu Md Saidur Rahman Elikanah Olusayo Adegoke Myung-Geol Pang Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
description	Abstract Background Sex preselection is a desired goal of the animal industry to improve production efficiency, depending on industry demand. In the porcine industry, there is a general preference for pork from female and surgically castrated male pigs. Therefore, the birth of more females than males in a litter leads to economic benefits and improved animal welfare in the pig production industry. Our previous study suggested that the porcine semen extender (BTS) adjusted to pH 6.2 maximises the differences in viability between X-chromosome-bearing (X) spermatozoa and Y-chromosome-bearing (Y) spermatozoa without affecting sperm’s functional parameters. In this study we aimed to evaluate whether the pH 6.2 extender is applicable at the farm level for increasing the number of female piglets without a decline in spermatozoa fertility. Artificial insemination (AI) was carried out with spermatozoa stored at pH 6.2 and pH 7.2 (original BTS) at day 1 and day 2 of storage. Next, the functional parameters of the spermatozoa, litter size, farrowing rate, and female-to-male ratio of offspring were determined. Results Although sperm motility decreased significantly after 2 d of storage, the viability of spermatozoa was preserved at pH 6.2 for 3 d. There was no significant difference in the farrowing rate and average litter size between the group inseminated with the spermatozoa stored in (pH 7.2) and that inseminated with spermatozoa stored in acidic BTS. The percentage of female piglets was approximately 1.5-fold higher in sows inseminated on day 1 in the pH 6.2 than in the pH 7.2 group. Furthermore, although there was no significant difference in the female-to-male ratio, the percentage of female piglets born was slightly higher in the pH 6.2 group than in the pH 7.2 group on day 2. Conclusions The method optimised in our study is simple, economical, and may enhance the number of female births without any decline in spermatozoa fertility.
format	article
author	Yoo-Jin Park Dong-Ha Shin Won-Ki Pang Do-Yeal Ryu Md Saidur Rahman Elikanah Olusayo Adegoke Myung-Geol Pang
author_facet	Yoo-Jin Park Dong-Ha Shin Won-Ki Pang Do-Yeal Ryu Md Saidur Rahman Elikanah Olusayo Adegoke Myung-Geol Pang
author_sort	Yoo-Jin Park
title	Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
title_short	Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
title_full	Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
title_fullStr	Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
title_full_unstemmed	Short-term storage of semen samples in acidic extender increases the proportion of females in pigs
title_sort	short-term storage of semen samples in acidic extender increases the proportion of females in pigs
publisher	BMC
publishDate	2021
url	https://doaj.org/article/5d8a7cc5bd284a3e90045eb1c49494e0
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Short-term storage of semen samples in acidic extender increases the proportion of females in pigs

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