Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients

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dc.contributor.authorNogueira, Ériklis
dc.contributor.authorCardoso, Gabriel Saravi
dc.contributor.authorMarques Junior, Heitor Romero
dc.contributor.authorDias, Alexandre Menezes
dc.contributor.authorÍtavo, Luís Carlos Vinhas
dc.contributor.authorBorges, Juliana Corrêa [UNESP]
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUCDB Curso de Medicina Veterinária
dc.contributor.institutionUCDB Programa de Mestrado e Doutorado em Ciências Ambientais e Sustentabilidade Agropecuária
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:15:44Z
dc.date.available2014-05-20T13:15:44Z
dc.date.issued2012-09-01
dc.description.abstractThe objective of this study was to evaluate pregnancy rates of recipients of different breed groups (Nellore and crossbreed), as well as the effects of size and type of the corpus luteum (CL) on plasmatic concentrations of progesterone and pregnancy rates of embryo recipients. A total of 152 heifers were synchronized with progesterone implants and on the day of embryo transfer, previously obtained by superovulation and frozen in ethylene glycol, the diameter and type of the corpus luteum (cavitary and compact) was measured and blood was collected for progesterone measurement. The pregnancy rate was 44.1%, with a diameter of corpus luteum higher in recipients that became pregnant (2.03±0.41) compared with non-pregnant ones (1.86±0.34 cm). Plasmatic concentrations of progesterone did not differ between pregnant (1.50±1.05) and non-pregnant (1.31±0.91 ng/mL) animals. The type of corpus luteum did not influence the pregnancy rates. Only Angus and crossbred Marchigiana differ among themselves in pregnancy rates (33.3 and 59.2%, respectively). The pregnancy probability was affected only by CL diameter, but not by P4 plasmatic concentration. Selection of the corpus luteum size at the time of embryo transfer is an important factor to increase pregnancy rates in recipients, and compact and cavitary corpora lutea do not influence the pregnancy rates of bovine embryo recipients. Nellore recipients have pregnancy rates that are satisfactory and comparable to crossbred (Bos taurus × Bos indicus) recipients.en
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) PANTANAL
dc.description.affiliationUCDB Curso de Medicina Veterinária
dc.description.affiliationUCDB Programa de Mestrado e Doutorado em Ciências Ambientais e Sustentabilidade Agropecuária
dc.description.affiliationUNESP FCAV Departamento de Fisiologia Animal
dc.description.affiliationUnespUNESP FCAV Departamento de Fisiologia Animal
dc.format.extent2129-2133
dc.identifierhttp://dx.doi.org/10.1590/S1516-35982012000900022
dc.identifier.citationRevista Brasileira de Zootecnia. Sociedade Brasileira de Zootecnia, v. 41, n. 9, p. 2129-2133, 2012.
dc.identifier.doi10.1590/S1516-35982012000900022
dc.identifier.fileS1516-35982012000900022.pdf
dc.identifier.issn1516-3598
dc.identifier.scieloS1516-35982012000900022
dc.identifier.urihttp://hdl.handle.net/11449/2790
dc.identifier.wosWOS:000311562800022
dc.language.isoeng
dc.publisherSociedade Brasileira de Zootecnia
dc.relation.ispartofRevista Brasileira de Zootecnia
dc.relation.ispartofsjr0,337
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectcavitary corpus luteumen
dc.subjectNelloreen
dc.subjectProgesteroneen
dc.subjectUltrasounden
dc.titleEffect of breed and corpus luteum on pregnancy rate of bovine embryo recipientsen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/rbz/paboutj.htm
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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Artigos - Morfologia e Fisiologia Animal - FCAV