INFLUENCE OF HIGH DRY MATTER INTAKE ON THE SUPEROVULATORY RESPONSE OF CROSSBRED COWS

Authors

  • Michele Ricieri Bastos FMVZ-Unesp, Botucatu
  • Alexandre Floriani Ramos Embrapa Recursos Genéticos e Biotecnologia
  • Katlen Driessen Embrapa Recursos Genéticos e Biotecnologia
  • Aline Carvalho Martins FMVZ-Unesp, Botucatu
  • Rodolfo Rumpf Embrapa Recursos Genéticos e Biotecnologia
  • Roberto Sartori Departamento de Zootecnia, ESALQ

DOI:

https://doi.org/10.5216/cab.v10i4.3878

Keywords:

Animal reproduction

Abstract

This study investigated the effect of high dry matter intake (Flushing) on the superovulatory response of crossbred Nelore x Simmental cows. Fourteen non-lactating cows, with a mean body condition score (BCS) of 4.0 (scale from 1 to 5) were randomly assigned into two groups (Maintenance=M or Flushing=F). Seven days prior to onset of superovulation (SOV) until the last day of treatment with FSH, group F cows were fed a diet to achieve 180% of maintenance. Group M cows were fed a maintenance diet. Seven days after AI, embryos were collected and evaluated. Forty days later, the treatment groups were inverted and another SOV was realized. Variables were compared by paired t test and data are presented as mean ± SEM. The number of recruited (19.6±1.8 and 16.4±2.0) and ovulated (15.0±1.6 and 13.0±1.6) follicles detected by ultrasonography did not differ between the M and F groups, respectively (P>0.10). However, the total number of embryos/ova (14.1±2.3 and 9.5±1.5) and the number of viable embryos (10.1±2.1 and 6.7±1.5) recovered were greater in group M (P<0.05). Under the conditions of this study, we conclude that nutritional flushing previously to SOV may compromise embryo production in cows with high BCS.
KEY WORDS: Bovine, embryo, nutrition, superovulation.

Downloads

Download data is not yet available.

Author Biography

Roberto Sartori, Departamento de Zootecnia, ESALQ

Embrapa Recursos Genéticos e Biotecnologia, 70770-900, Brasília-DF, Brasil.

Downloads

Published

2009-12-17

How to Cite

BASTOS, M. R.; RAMOS, A. F.; DRIESSEN, K.; MARTINS, A. C.; RUMPF, R.; SARTORI, R. INFLUENCE OF HIGH DRY MATTER INTAKE ON THE SUPEROVULATORY RESPONSE OF CROSSBRED COWS. Brazilian Animal Science/ Ciência Animal Brasileira, Goiânia, v. 10, n. 4, p. 1066–1073, 2009. DOI: 10.5216/cab.v10i4.3878. Disponível em: https://revistas.ufg.br/vet/article/view/3878. Acesso em: 18 may. 2024.

Issue

Vol. 10 No. 4 (2009)

Section

Animal Production

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g. in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).