Teste de penetração espermática em oócitos in vitro e fertilidade in vivoapósinseminação heterospérmica em suínos

• Ano de defesa: 2007
• Autor(a) principal: Macedo Júnior, Milton Carvalho
• Orientador(a): Deschamps, João Carlos
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Pelotas
• Programa de Pós-Graduação: Programa de Pós-Graduação em Biotecnologia
• Departamento: Biotecnologia
• País: BR
• Palavras-chave em Português: Teste de penetração espermática in vitro; Criopreservação de oócitos; Diagnóstico de paternidade; Suínos
• Palavras-chave em Inglês: In vitro penetration test; Oocyte cryopreservation; Paternity test; Swine
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA::REPRODUCAO ANIMAL
• Link de acesso: http://guaiaca.ufpel.edu.br/handle/123456789/1252

The knowledge of the reproductive potential of a male is of economic and reproductive importance, mainly if used in programs of artificial insemination. The conventional tests for semen quality evaluation do not have the capacity to measure the fertilizing potential of a sample, although they indicate if that one is fertile or not. The in vitro penetration test, appears in this context as an alternative laboratorial test to categorize of males capacity of fecundation, as mimics in vitro what happens in vivo. However this test has its use limited for for difficult execution and high cost. With the objective to simplify the test, the present work evaluated alternatives for reduction of the execution time, use of cryopreserved oocytes in different methods and its association with in vivo fertility through heterospermic insemination and following diagnostic fertility. It was concluded that: 1) It is possible to use the incubation system BOTTLE, to replace the conventional incubation system, eliminating the need for using expansive CO2 incubator; 2) Oocytes can be cryopreserved in CRIOVIAL, together with the medium of fecundation and mineral oil, eliminating the use of stereoscopic lupa to manipulate oocytes in the day of the execution of the test; 3) It is viable to reduce co-incubation time of oocytes and sperm for 6 hours, if sperm concentration is of 2 X 106 per ml of way of used fecundation; 4) The paternity diagnosis disclosed that when inseminating females swine with one pool of semen of four males, using a dose of 2,8 X 109 spermatozoa, all the males had the same participation in the paternity of the produced pigs