Efeito de diferentes métodos de congelamento, diluentes e tempos de resfriamento sobre a qualidade do sêmen suíno criopreservado / Effect of different freezing methods, extenders and duration of freezing on quality of frozen boar semen
Bianchi, Ivan; Madeira, Elisângela Mirapalheta; Schneider, Augusto; Rabassa, Viviane Rohrig; Corrêa, Érico Kunde; Lucia Junior, Thomaz; Corrêa, Marcio Nunes.
Acta sci. vet. (Online);
39(1): 01-07, 2011. tab
Artigo
em Português
| VETINDEX
| ID: vti-381301
Resumo
Artificial inseminations in swine are conducted with liquid semen cooled at 15 to 18ºC for 1 to 5 d. Frozen semen in not routinely used due to its poor reproductive performance in comparison with cooled semen. In semen freezing protocols, egg yolk is added to extenders to protect the sperm membrane against cold shock. The cryoprotectant effect of egg yolk is attributed to the presence of low density lipoprotein (LDL) in its composition. Thus, replacement of egg yolk by LDL in the composition of extenders may be feasible to reduce cryoinjuries in sperm cells due to cold shock. During the process of sperm freezing the cell receive structural and functional injuries that could impair the fertilization process. Two experiments were conducted to evaluate the effect of freezing method, extenders and duration of the freezing process.[...](AU)
Biblioteca responsável:
BR68.1
Localização: BR68.1
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