Data/hora: 16/06/2024 01:19:14

Biblioteca(s): | Embrapa Caprinos e Ovinos.
Data corrente: | 28/04/2020
Data da última atualização: | 10/08/2021
Autoria: | PINTO, P. H. N.; BALARO, M. F. A.; SARAIVA, H. F. R. de A.; BRAIR, V. L.; ALFRADIQUE, V. A. P.; CÔRTESA, L. R.; COSENTINO, I. O.; SOUZA-FABJANA, J. M. G.; FONSECA, J. F. da; BRANDÃO, F. Z.
Afiliação: | PEDRO HENRIQUE NICOLAU PINTO, Universidade Federal Fluminense; MARIO FELIPE ALVAREZ BALARO, Universidade Federal Fluminense; HELENA FABIANA REIS DE ALMEIDA SARAIVA, Universidade Federal Fluminense; VIVIANE LOPES BRAIR, Universidade Federal Fluminense; VIVIAN ANGÉLICO PEREIRA ALFRADIQUE, Universidade Federal Fluminense; LUANA RANGEL CÔRTESA, Universidade Federal Fluminense; ISABEL OLIVEIRA COSENTINO, Universidade Federal Fluminense; JOANNA MARIA GONCALVES SOUZA-FABJANA; JEFERSON FERREIRA DA FONSECA, CNPC; FELIPE ZANDONADI BRANDÃO, Universidade Federal Fluminense.
Título: | Successive in vivo embryo production in Santa Inês sheep.
Ano de publicação: | 2020
Fonte/Imprenta: | Animal Production Science, v. 60, n. 4, p. 497-502, Dec. 2020.
DOI: | https://doi.org/10.1071/AN18740
Idioma: | Inglês
Conteúdo: | Abstract: Context. In vivoembryo production, also called multiple ovulation and embryo transfer, can accelerate genetic gain, andthus improve animal production. However, there are issues limiting a wider use of this biotechnology in sheep livestock.Aims.This study aimed to determine (1) whether a previous response to superovulation (SOV) can be used as a criterionto select ewes forin vivoembryo production, (2) whether the intensity of the SOV response (number of corpora lutea, CL)can affect the embryo recovery rate, and (3) whether the number of CL quantified by colour Doppler ultrasonography can beused to calculate the recovery rate.Methods.Twenty-five Santa Inês ewes underwent SOV three times (SOV1, SOV2 and SOV3), with 200 mg FSH andnatural mating. The number of CL after each SOV was determined by laparoscopy and by colour Doppler ultrasonography.Key results.The number of CL significantly decreased (P<0.05) after SOV1 (7.54.8) to 3.05.0 at SOV 2 and2.23.5 at SOV3. Strong correlations were observed between SOV2 and SOV3 in terms of numbers of CL (r= 0.86,r2= 0.74;P<0.0001) and viable embryos (r= 0.79,r2= 0.63;P<00001). However, no correlations were observed betweenSOV1 and SOV2 or between SOV1 and SOV3. Recovery rate did not differ with the intensity of the SOV response(6, 7?10,>10 CL) or between the methods used to quantify CL.Conclusions.Ewes did not show the same pattern of response when submitted to successive FSH-based SOV. Theintensity of the SOV response did not affect the recovery rate, and the number of CL estimated by colour Dopplerultrasonography can be used to calculate the recovery rate.Implications.Selecting sheep embryo donors by a previous SOV response is not always feasible. The recovery rate ishomogeneous and it is not affected by the intensity of the SOV response. A nonsurgical technique can be used to assess therecovery rate, improving animal welfare in MOET programs.
Palavras-Chave: | MOET; Ovarian superstimulation.
Thesagro: | Corpo Lúteo; Melhoramento Genético Animal; Ovino; Reprodução Animal; Superovulação; Transferência de Embrião.
Thesaurus Nal: | Animal reproduction; Breeding and Genetic Improvement; Corpus luteum; Embryo transfer; Ewes; Superovulation.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Caprinos e Ovinos (CNPC)
Exemplares: | CNPC - (39581-1) - UPC - AP - DD -  -  -  - DIS