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Effect of supplementation of unsaturated fatty acids on the performance, oocyte and embryo quality in dairy cows during the transition period and early lactation

Grant number: 09/10180-0
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2009
Effective date (End): September 30, 2012
Field of knowledge:Agronomical Sciences - Veterinary Medicine - Animal Reproduction
Principal Investigator:Francisco Palma Rennó
Grantee:Jefferson Rodrigues Gandra
Host Institution: Faculdade de Medicina Veterinária e Zootecnia (FMVZ). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The transition period is considered extremely important step in the production cycle of dairy cows according to the occurrence of several changes in metabolism and physiology of the animal. These changes, mediated by hormonal and metabolic responses are from the modification of physiological status predominant, alternating a state of pregnant and non-lactation for another non-pregnant and lactation, where changes in power and handling at that stage of production, may result in significant changes in animal metabolism, altering the productive and reproductive performance of animals during the production cycle. Recent literature shows that despite efforts are being directed in some centers in conducting research projects in this area, these studies revealed the need to increase the number of projects conducted in the area because of the complexity of the issue and its implications, especially economic in feeding and management of dairy cows in the transition period. This scenario highlights the need, importance and difficulty of developing research to understand the effects of changes in nutrition and metabolism in animal management, with consequent alteration of the reproductive and productive response. At the level of Brazil, the research in this area are scarce, according to the experimental difficulties related to the subject, the subject of a relatively recent or even the need of the projects being developed evaluating different areas of knowledge, showing marked multidisciplinary.This study aims to evaluate the effects of different sources of unsaturated fatty acid supplement to diet in the transition period and early lactation on the quality of oocytes and embryo, the concentrations of plasma metabolites and hormones, the production and composition of milk, reproductive performance, ruminal fermentation and digestibility of diets in Holstein dairy cows.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
GANDRA, J. R.; BARLETTA, R. V.; MINGOTI, R. D.; VERDURICO, L. C.; FREITAS, JR., J. E.; OLIVEIRA, L. J.; TAKIYA, C. S.; KFOURY, JR., J. R.; WILTBANK, M. C.; RENNO, F. P.. Effects of whole flaxseed, raw soybeans, and calcium salts of fatty acids on measures of cellular immune function of transition dairy cows. JOURNAL OF DAIRY SCIENCE, v. 99, n. 6, p. 4590-4606, . (11/07726-1, 09/10180-0)
GANDRA, J. R.; MINGOTI, R. D.; BARLETTA, R. V.; TAKIYA, C. S.; VERDURICO, L. C.; FREITAS, JR., J. E.; PAIVA, P. G.; JESUS, E. F.; CALOMENI, G. D.; RENNO, F. P.. Effects of flaxseed, raw soybeans and calcium salts of fatty acids on apparent total tract digestibility, energy balance and milk fatty acid profile of transition cows. ANIMAL, v. 10, n. 8, p. 1303-1310, . (09/10180-0)
GANDRA, JEFFERSON RODRIGUES; VERDURICO, LENITA CAMARGO; MINGOTI, RODOLFO DANIEL; TAKIYA, CAIO SEITI; GARDINAL, RODRIGO; ANIBALLE VENDRAMINI, THIAGO HENRIQUE; BARLETTA, RAFAEL VILLELA; VISINTIN, JOSE ANTONIO; RENNO, FRANCISCO PALMA. Whole flaxseed, raw soybeans, and calcium salts of fatty acids supplementation for transition cows: follicle development and embryo quality. Italian Journal of Animal Science, v. 16, n. 4, p. 538-545, . (11/07726-1, 09/10180-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
GANDRA, Jefferson Rodrigues. Sources of fatty acid ω3 and ω6 in dairy cows diets during the transition period and early lactation. 2012. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Medicina Veterinária e Zootecnia (FMVZ/SBD) Pirassununga.

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