Protocols J-Synch with and without eCG in Brown Swiss and crosses Whith Bos Indicus cows in the Ecuadorian Amazons

La Granja. Revista de Ciencias de la Vida

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Title Protocols J-Synch with and without eCG in Brown Swiss and crosses Whith Bos Indicus cows in the Ecuadorian Amazons
Protocolo J-synch con y sin eCG en vacas Brown Swiss y sus cruzas con Bos Indicus en la amazonía ecuatoriana
Protocolos J-Synch com e sem eCG em castanho suíço e cruza com vacas Indicus Bos na Amazónia equatoriana
 
Creator Yánez-Avalos, Darwin Omar
Barbona, Ivana
López-Parra, Juan Carlos
Marini, Pablo Roberto
 
Subject Follicular dynamics
pregnancy
progesterone
fixed time artificial insemination
Dinámica follicular
preñez
progesterona
inseminación artificial a tiempo fijo
dinâmica folicular
prenhez
progesterona
inseminação artificial em tempo fixo
 
Description The incorporation of prolonged proestrus protocols under extreme conditions has improved conception. Therefore, the objective of this research was to evaluate the results of the protocol with prolonged proestrus called J-Synch with and without eCG, on follicular dynamics and pregnancy percentage in dual purpose cows in the Ecuadorian Amazon. The study was carried out in the province of Pastaza - Ecuador, from October 2018 to October 2019. We used 448 multiparous cows in production with calves at foot of Brown Swiss breeds and their crosses (Bos indicus). Four treatments were used, cows were artificially inseminated at fixed time on day nine T1: J-Synch, eCG, IATF estrus 60 hours (n= 120); T2: J-Synch and eCG and No Estrus+ GnRH IATF 72 hours (n=118); T3: J-Synch and Estrus IATF 60 hours (n=103); T4: J-Synch plus No Estrus plus GnRH plus IATF 72 Hours (n=107). Pregnancy rates were 55% (T1), 49% (T2), 51% (T3) and 50% (T4) with no significant differences. Follicular development and corpus luteum diameter showed significant differences (p0.05). It is concluded that the J-Synch plus eCG treatments at 60 hours and 72 hours had different behaviour in follicular development and corpus luteum size. Pregnancy percentages did not differ between treatments, although there was a 44.5% greater chance of a cow becoming pregnant with T1 compared to T2. In addition, 22.5% higher pregnancy would be achieved with T1 compared to T3, and 18% higher pregnancy would be achieved with T3 compared to T2.
La incorporación de protocolos con proestro prolongado en condiciones extremas ha permitido mejorar la concepción. Por lo tanto, el objetivo de esta investigación fue evaluar los resultados del protocolo con proestro prolongado denominado J-Synch con y sin eCG, sobre la dinámica folicular y porcentaje de preñez en vacas doble propósito en la Amazonía Ecuatoriana. El trabajo se efectuó en la provincia de Pastaza - Ecuador, desde octubre del 2018 a octubre del 2019. Se utilizaron 448 vacas multíparas en producción con cría al pie de las razas Brown Swiss y sus cruzas (Bos indicus). Se trabajó con cuatro tratamientos, las vacas fueron inseminadas artificialmente a tiempo fijo en el día nueve T1: J-Synch, eCG, Celo IATF 60 horas (n= 120); T2: J-Synch y eCG y Sin Celo+ GnRH IATF 72 horas (n=118); T3: J-Synch y Celo IATF 60 horas (n=103); T4: J-Synch más Sin Celo más GnRH más IATF 72 Horas (n=107). La tasa de preñez fue del 55% (T1), el 49% (T2), el 51% (T3) y el 50% (T4) sin mostrar diferencias significativas. El desarrollo folicular y el diámetro del cuerpo lúteo mostraron diferencias significativas (p0,05). Se concluye que los tratamientos J-Synch más eCG a las 60 horas y las 72 horas tuvieron diferente comportamiento en el desarrollo folicular y en el tamaño del cuerpo lúteo. El porcentaje de preñez no difirió entre los tratamientos, aunque existió un 44,5% más probabilidad de quedar preñada una vaca con el T1 en comparación con el T2. Además, que aumentaría un 22,5% la preñez aplicando el T1 en comparación con el T3, y se lograría un 18% mayor de preñez con el T3 si se compara con el T2.
A incorporação de protocolos com proestro prolongado em condições extremas, tem permitido melhorar a concepção. Portanto, o objetivo da pesquisa foi avaliar os resultados do protocolo com proestro prolongado denominado J-Synch com e sem eCG, na dinâmica folicular e na taxa de prenhez em vacas de duplo propósito na Amazônia Equatoriana. O trabalho foi realizado na Província de Pastaza - Equador, de outubro de 2018 a outubro de 2019. Foram utilizadas 448 vacas multíparas na produção com cria a pé de raças Brown Swiss puras e cruzadas com Bos indicus. Quatro tratamentos foram usados, onde as vacas foram inseminadas artificialmente em tempo fixo no nono dia T1: J - Synch + eCG + Cio IATF 60 horas (n=120); T2: J - Synch + eCG + Sim Cio + GnRH IATF 72 horas (n=118), T3: J - Synch + Cio – IATF 60 horas. (n=103); T4: J - Synch+ Sim Cio + GnRH + IATF 72 Horas (n=107). A taxa de prenhez foi de 55% (T1), 49% (T2), 51% (T3) e 50% (T4) sem apresentar diferenças significativas. O desenvolvimento folicular e o diâmetro do corpo lúteo apresentaram diferenças significativas (p≤0,05). Conclui-se que os tratamentos J-Synch mais eCG às 60 horas e 72 horas tiveram comportamento diferente no desenvolvimento folicular e no tamanho do corpo lúteo. A taxa de prenhez não diferiu entre os tratamentos, embora tenha havido uma probabilidade de 44,5% maior de uma vaca emprenhar com T1 em comparação com T2. Além disso, essa prenhez aumentaria em 22,5% aplicando T1 em comparação com T3, e uma gravidez 18% maior seria alcançada com T3 quando comparada com T2.
 
 
Publisher Universidad Politécnica Salesiana
 
Date 2021-02-24
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
 
Format application/pdf
application/pdf
text/html
application/zip
 
Identifier https://lagranja.ups.edu.ec/index.php/granja/article/view/33.2021.01
10.17163/lgr.n33.2021.01
 
Source La Granja; Vol. 33 Núm. 1: (marzo 2021-agosto 2021) ; 8-20
La Granja; Vol 33 No 1: (March 2021-August 2021) ; 8-20
La Granja; v. 33 n. 1: (Março de 2021-Agosto de 2021) ; 8-20
1390-8596
1390-3799
10.17163/lgr.n33
 
Language spa
eng
 
Relation https://lagranja.ups.edu.ec/index.php/granja/article/view/33.2021.01/4347
https://lagranja.ups.edu.ec/index.php/granja/article/view/33.2021.01/4348
https://lagranja.ups.edu.ec/index.php/granja/article/view/33.2021.01/4405
https://lagranja.ups.edu.ec/index.php/granja/article/view/33.2021.01/4406
 
Rights Copyright (c) 2021 Universidad Politénica Salesiana
http://creativecommons.org/licenses/by-nc-sa/4.0
 

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