A Brief Review of Frozen Semen Application Under Norwegian Ai Service Conditions

Almlid, T.; Hofmo, P. O.

doi:10.1111/j.1439-0531.1995.tb00021.x

Cited by 38 publications

(31 citation statements)

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“…When frozen-thawed boar semen is used for AI, the farrowing rates are reduced by 10-25% and the litter sizes are reduced by 1 -3 piglets compared with AI with fresh semen (Johnson et al 1981, Almlid & Hofmo 1996. Breed-specific fertility data from field trials with Norwegian boars are limited; however, semen frozen during the 1990s seems to indicate a breed-specific response to cryopreservation.…”

Section: Introductionmentioning

confidence: 99%

Within and between breed differences in freezing tolerance and plasma membrane fatty acid composition of boar sperm

Waterhouse¹,

Hofmo²,

Tverdal³

et al. 2006

Reproduction

161

101

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The response of sperm to cryopreservation and the fertility of frozen -thawed semen varies between species. Besides species differences in sperm physiology, structure and biochemistry, factors such as sperm transport and female reproductive tract anatomy will affect fertility of frozen-thawed semen. Therefore, studying differences in sperm cryotolerance between breeds and individuals instead of between species may reveal sources of variability in sperm cryotolerance. In the present study, the effect of cooling, re-warming and freezing and thawing on plasma membrane and acrosome integrity of sperm within and between Norwegian Landrace and Duroc breeds was studied. Furthermore, the relation between post-thaw survival rate and fatty acid composition of the sperm plasma membranes was investigated. Flow cytometry assessments of plasma membrane and acrosome integrity revealed no significant differences between breeds; however there were significant male-to-male variations within breeds in post-thaw percentages of live sperm (plasma membrane intact). The most abundant fatty acids in the plasma membranes from both breeds were palmitic acid (16:0), stearic acid (18:0), oleic acid (18:1, n-9), docosapentaenoic acid (22:5, n-6) and docosahexaenoic acid (22:6, n-3). The ratio of S 22:5, n-6 and 22:6, n-3/S all other membrane fatty acids was significantly related to survival rate (plasma membrane integrity) of sperm for both Norwegian Landrace (correlation coefficient (r s ) 5 0.64, P < 0.05) and Duroc (r s 5 0.67, P < 0.05) boars. In conclusion, male-to-male differences in sperm survival rate after freezing and thawing may be partly related to the amount of long-chain polyunsaturated fatty acids in the sperm plasma membranes.

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Section: Introductionmentioning

confidence: 99%

Within and between breed differences in freezing tolerance and plasma membrane fatty acid composition of boar sperm

Waterhouse¹,

Hofmo²,

Tverdal³

et al. 2006

Reproduction

161

101

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show abstract

“…Em estudos com suínos, alguns autores (Johnson et al, 1981;Almlid & Hofmo, 1996;Woelders et al, 1996) citam que diferenças raciais influenciam na congelabilidade do sêmen. Adicionalmente, Ohata et al (2001) observaram diferenças no sêmen de machos de mesma composição genética, após o descongelamento, de até 18% na porcentagem de acrossomas normais e de 10% na motilidade espermática, fato que indica efeito varrão na congelabilidade de sêmen suíno.…”

Section: Resultsunclassified

“…No entanto, o emprego de sêmen congelado ainda apresenta índices reprodutivos insatisfatórios e está associado à redução de menos 10 a 20% na taxa de parto e de 1 a 2 leitões por leitegada (Johnson, 1998) em relação aos obtidos com o uso de sêmen resfriado (Almlid & Hofmo, 1996;Mileham et al, 1997;Woelders, 1997).…”

Section: Introductionunclassified

Semen cryopreservation of Piau swine breed submited to three freezing protocols

Barros¹,

Shiomi

Amorim

et al. 2012

R. Bras. Zootec.

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“…Cryopreservation of boar semen need to be developed for AI in the pig industry due to a number of reasons including preservation of a good genetic resource, increase genetic improvement, distribution of genetic lines across countries and reduce boar transportation www.intechopen.com (Almlid and Hofmo, 1996;Johnson, 1998). The widespread exchange of genetic material between breeding populations with liquid stored semen is difficult because of the short life span of the spermatozoa (Wagner and Thibier, 2000;Johnson et al, 2000).…”

Section: Cryopreservation Of Animal Spermatozoamentioning

confidence: 99%

“…Cryopreservation of boar semen is useful for preservation of genetic resources, improve the genetic progress and enhance the transportation of genetic material across countries (Almlid and Hofmo, 1996;Johnson, 1998). In addition, the frozen-thawed (FT) boar semen is also used with other reproductive technologies, such as in vitro fertilization (IVF), embryo transfer (ET) and sex pre-selection (Gerrits et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Cryopreservation of Boar Spermatozoa: An Important Role of Antioxidants

Kaeoket¹

2012

Current Frontiers in Cryopreservation

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A Brief Review of Frozen Semen Application Under Norwegian Ai Service Conditions

Cited by 38 publications

References 1 publication

Within and between breed differences in freezing tolerance and plasma membrane fatty acid composition of boar sperm

Within and between breed differences in freezing tolerance and plasma membrane fatty acid composition of boar sperm

Semen cryopreservation of Piau swine breed submited to three freezing protocols

Cryopreservation of Boar Spermatozoa: An Important Role of Antioxidants

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