RT article
T1 MOET Efficiency in a Spanish Herd of Japanese Black Heifers and Analysis of Environmental and Metabolic Determinants
A1 Vázquez-Mosquera, Juan M.
A1 Fernández-Novo, Aitor
A1 Bonet-Bo, Martin
A1 Pérez-Villalobos, Natividad
A1 Pesántez-Pacheco, Jose L.
A1 Pérez-Solana, Maria L.
A1 De-Mercado, Eduardo
A1 Gardón, Juan C.
A1 Villagrá, Arantxa
A1 Sebastián, Francisco
A1 Pérez-Garnelo, Sonia S.
A1 Martínez, Daniel
A1 Astiz, Susana
K1 Japanise black
K1 Multiple ovulation and embryo transfer (MOET)
K1 L10  Animal genetics and breeding
K1 L53  Animal physiology - Reproduction
K1 L50  Animal physiology and biochemistry
K1 Donor animals
K1 Recipient animals
K1 Cholesterol
K1 Genetic improvement
K1 Nutrients
AB Multiple ovulation and embryo transfer (MOET) systems have been intensively implemented in Japanese Black cattle in Japan and to create Japanese Black herds out of these areas. Environmental conditions influence MOET efficiency. Thus, we describe results of 137 in vivo, non-surgical embryo flushings performed between 2016–2020, in a full-blood Japanese Black herd kept in Spain and the possible effects of heat, year, bull, donor genetic value, and metabolic condition. Additionally, 687 embryo transfers were studied for conception rate (CR) and recipient related factors. A total of 71.3% of viable embryos (724/1015) were obtained (5.3 ± 4.34/flushing). Donor metabolites did not affect embryo production (p > 0.1), although metabolite differences were observed over the years, and by flushing order, probably related to the donor age. CR was not affected by embryo type (fresh vs. frozen), recipient breed, and whether suckling or not suckling (p > 0.1). CR decreased significantly with heat (44.3 vs. 49.2%; (p = 0.042)) and numerically increased with recipient parity and ET-number. Pregnant recipients showed significantly higher levels of cholesterol-related metabolites, glucose, and urea (p < 0.05). Therefore, adequate MOET efficiency can be achieved under these conditions, and heat stress should be strongly avoided during Japanese Black embryo transfers. Moreover, recipients’ metabolites are important to achieve pregnancy, being probably related to better nutrient availability during pregnancy.
PB MDPI
SN 2079-7737
YR 2022
FD 2022
LK http://hdl.handle.net/20.500.11939/8166
UL http://hdl.handle.net/20.500.11939/8166
LA en
NO Vázquez-Mosquera, J. M., Fernández-Novo, A., Bonet-Bo, M., Pérez-Villalobos, N., Pesántez-Pacheco, J. L., Pérez-Solana, M. L. et al. (2022). MOET Efficiency in a Spanish Herd of Japanese Black Heifers and Analysis of Environmental and Metabolic Determinants. Biology, 11(2), 225.
DS MINDS@UW
RD Feb 8, 2023