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Technological innovations to increase productivity in beef cattle: nutritional and genetic interrelationships about puberty, reproduction and production. Protocols for TAI. Gene expression in reproductive processes


The food production in the world needs to increase around 70% by 2050 to feed an additional 2.3 million people. The expected increase in beef consumption is even greater, and its production is expected to increase from 60 to 130 million tonnes in the same period (FAO, 2013) using the same resources in limited areas. Therefore, only increasing the efficiency in the segment can provide strategies that promote such production. One of the world's leading beef exporters, Brazil have a beef herd composed of 80% of zebu breeds, especially Nellore. Despite this economic importance, there are still large gaps in the scientific approach that limit knowledge of nutrition and reproductive physiology of Nellore and its crossbreed with Angus, the most common crossbreed on a commercial scale in Brazil. Then, this project aims to advance significantly in filling these gaps by including eleven experiments that will cover the understanding of anticipating puberty in Nellore and crossbred heifers, evaluation of hormonal TAI protocols, including studies that detail the understanding of luteolysis, a nutritional supplementation after insemination to minimize losses, and lately, with a study of the impacts that heifers with improper temperament cause on its reproductive rates. In order to perform this, a strong partnership between researchers from ESALQ-USP, The Ohio State University, Oregon State University, UNESP Araçatuba and FMVZ-USP will provide the accomplishment of this project, enabling the advancement in nutritional and reproductive physiological knowledge of Nellore and the main commercial crossbreed for the production of beef cattle in Brazil. (AU)

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Scientific publications (6)
(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)
CIPRIANO, R. S.; COOKE, R. F.; RODRIGUES, A. D.; SILVA, L. G. T.; BOHNERT, D. W.; MARQUES, R. S.; VASCONCELOS, J. L. M.; PIRES, A. V.; CERRI, R. L. A.. Post-artificial insemination supplementation with calcium salts of soybean oil influences pregnancy establishment factors in Bos indicus beef cows. JOURNAL OF ANIMAL SCIENCE, v. 94, n. 11, p. 4892-4902, . (14/14136-4)
FERRAZ, JR., M. V. C.; PIRES, A. V.; SANTOS, M. H.; SILVA, R. G.; OLIVEIRA, G. B.; POLIZEL, D. M.; BIEHL, M. V.; SARTORI, R.; NOGUEIRA, G. P.. A combination of nutrition and genetics is able to reduce age at puberty in Nelore heifers to below 18 months. ANIMAL, v. 12, n. 3, p. 569-574, . (14/14136-4)
MISZURA, A. A.; FERRAZ, M. V. C.; CARDOSO, R. C.; POLIZEL, D. M.; OLIVEIRA, G. B.; BARROSO, J. P. R.; GOBATO, L. G. M.; NOGUEIRA, G. P.; BIAVA, J. S.; FERREIRA, E. M.; et al. Implications of growth rates and compensatory growth on puberty attainment in Nellore heifers. DOMESTIC ANIMAL ENDOCRINOLOGY, v. 74, . (14/14136-4)
FERRAZ, M. V. C.; SANTOS, M. H.; OLIVEIRA, G. B.; POLIZEL, D. M.; BARROSO, J. P. R.; NOGUEIRA, G. P.; GOUVEA, V. N.; CARVALHO, P. H. V.; BIAVA, J. S.; FERREIRA, E. M.; et al. Effect of growth rates on hormonal and pubertal status in Nellore heifers early weaned. TROPICAL ANIMAL HEALTH AND PRODUCTION, v. 55, n. 3, p. 13-pg., . (18/06242-0, 16/17598-4, 14/14136-4)
COOKE, R. F.; SCHUBACH, K. M.; MARQUES, R. S.; PERES, R. F. G.; SILVA, L. G. T.; CARVALHO, R. S.; CIPRIANO, R. S.; BOHNERT, D. W.; PIRES, A. V.; VASCONCELOS, J. L. M.. Effects of temperament on physiological, productive, and reproductive responses in Bos indicus beef cows. JOURNAL OF ANIMAL SCIENCE, v. 95, n. 1, p. 1-8, . (14/19485-7, 14/14136-4)
SANTOS, MARCELO H.; FERRAZ JUNIOR, MARCOS VINICIUS C.; POLIZEL, DANIEL M.; BARROSO, JOSE PAULO R.; MISZURA, ALEXANDRE A.; MARTINS, ANDRE S.; BERTOLONI, ANALISA V.; OLIVEIRA, GABRIELA B.; PIRES, ALEXANDRE V.. Decreasing from 9 to 7 days the permanence of progesterone inserts make possible their use up to 5 folds in suckled Nellore cows. Theriogenology, v. 111, p. 56-61, . (14/14136-4)

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