PREGNANCY RATES IN HEIFERS INSEMINATED WITH SEMEN OF NELORE BULLS SEXED BY FLOW CYTOMETRY

Authors

  • Adriana Mendes Duarte UFU
  • Elmo Gomes Diniz UFU
  • Mara Regina Bueno Mattos Nascimento UFU
  • Marcelo Tavares UFU
  • Rossana Vilela Resende Franco

DOI:

https://doi.org/10.5216/cab.v8i3.1734

Keywords:

Pregnancy, Insemination, Reproduction

Abstract

 The flow-sorting sperm technology is considered as the most promising technique for sexing semen, due to the separation accuracy of around 90%. Thus, the objec-tive of this study was to determinate the effect of Articial Insemination (AI) with semen of Nelore bulls sexed by flow cytometry on the pregnancy rate and its accuracy. Throughout the study, 427 Nelore heifers were inseminated with only one dose of semen as follows: 241 heifers were treated with flow-sexed sperm (3 x 106 total flow-sorting X-chromosome bearing sperm/dose) and 181 were treated with unsexed sperm (10 x 106 total sperm/dose). The heifers were inseminated after detection of natural heat or after syn-chronization treatment. The results obtained for pregnancy rates did not indicate differences between flow-sexed and unsexed sperm and the accuracy in the sex determination presented high levels and reliability (92.4%).

KEY-WORDS: Bovine,  Nelore,  spermatozoa,  sexing.

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Published

2007-09-15

How to Cite

DUARTE, A. M.; DINIZ, E. G.; NASCIMENTO, M. R. B. M.; TAVARES, M.; FRANCO, R. V. R. PREGNANCY RATES IN HEIFERS INSEMINATED WITH SEMEN OF NELORE BULLS SEXED BY FLOW CYTOMETRY. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 8, n. 3, p. 567–574, 2007. DOI: 10.5216/cab.v8i3.1734. Disponível em: https://revistas.ufg.br/vet/article/view/1734. Acesso em: 17 jul. 2024.

Issue

Vol. 8 No. 3 (2007)

Section

Veterinary Medicine

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