INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE
Background: Genetic improvement in the sheep species focuses on increasing the number of offspring per sheep. Heritable characteristics such as ovulation rate, fertility, and prolificacy are desirable. Objective: To evaluate the influence of estrus pre-synchronization with PGF2α on the manifestation...
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| Format: | Article |
| Language: | English |
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Universidad Autónoma de Yucatán
2023-02-01
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| Series: | Tropical and Subtropical Agroecosystems |
| Subjects: | |
| Online Access: | https://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/4269 |
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| author | Dante J. Hernández-Rubio María Del Carmen Navarro-Maldonado Sergio S. González-Muñoz Martha Hernández-Rodríguez Miguel P. Conde-Hinojosa César Cortez-Romero |
| author_facet | Dante J. Hernández-Rubio María Del Carmen Navarro-Maldonado Sergio S. González-Muñoz Martha Hernández-Rodríguez Miguel P. Conde-Hinojosa César Cortez-Romero |
| author_sort | Dante J. Hernández-Rubio |
| collection | DOAJ |
| description | Background: Genetic improvement in the sheep species focuses on increasing the number of offspring per sheep. Heritable characteristics such as ovulation rate, fertility, and prolificacy are desirable. Objective: To evaluate the influence of estrus pre-synchronization with PGF2α on the manifestation of estrus, onset and return to estrus (1st and 2nd), pregnancy, lambing, prolificacy, and fertility in Katahdin ewes carrying exon 2 of the gene Factor Growth and Differentiation 9 (GDF9). Methodology: Seventy-two ewes were randomized into four treatments (T): T1 (n = 18), ewes without GDF9 gene and without estrus pre-synchronization; T2 (n = 17), ewes without GDF9 gene and with estrus pre-synchronization; T3 (n = 19) ewes with the GDF9 gene and without estrus pre-synchronization, and T4 (n = 18), ewes with the GDF9 gene and with estrus pre-synchronization. Results: The presence of estrus, the onset of estrus, and returns to estrus, pregnancy, and lambing percentages were not different between treatments (p>0.05). The average pregnancy and lambing in both cases were 86.2% and the average general prolificacy was 1.4 lambs per ewe for all four treatments. There were also no significant differences for the prolificacy or fertility rate (p>0.05). Implications: The present study contributes to the understanding of the use of presynchronization with PGF2α and the effect of the presence of exon 2 of the GDF9 gene on reproductive variables. Conclusions: The presynchronization of estrus with PGF2α and the presence of exon 2 of the GDF9 gene in ewes of the Katahdin breed did not have a significant effect on the reproductive variables evaluated. |
| first_indexed | 2024-03-07T23:08:41Z |
| format | Article |
| id | doaj.art-0463e53d4cbe4b77897b50cb3b178690 |
| institution | Directory Open Access Journal |
| issn | 1870-0462 |
| language | English |
| last_indexed | 2024-03-07T23:08:41Z |
| publishDate | 2023-02-01 |
| publisher | Universidad Autónoma de Yucatán |
| record_format | Article |
| series | Tropical and Subtropical Agroecosystems |
| spelling | doaj.art-0463e53d4cbe4b77897b50cb3b1786902024-02-21T16:05:44ZengUniversidad Autónoma de YucatánTropical and Subtropical Agroecosystems1870-04622023-02-0126210.56369/tsaes.42691446INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENEDante J. Hernández-Rubio0María Del Carmen Navarro-Maldonado1Sergio S. González-Muñoz2Martha Hernández-Rodríguez3Miguel P. Conde-Hinojosa4César Cortez-Romero5Colegio de PostgraduadosUniversidad Autónoma MetropolitanaColegio de PostgraduadosColegio de PostgraduadosColegio de PostgraduadosColegio de PostgraduadosBackground: Genetic improvement in the sheep species focuses on increasing the number of offspring per sheep. Heritable characteristics such as ovulation rate, fertility, and prolificacy are desirable. Objective: To evaluate the influence of estrus pre-synchronization with PGF2α on the manifestation of estrus, onset and return to estrus (1st and 2nd), pregnancy, lambing, prolificacy, and fertility in Katahdin ewes carrying exon 2 of the gene Factor Growth and Differentiation 9 (GDF9). Methodology: Seventy-two ewes were randomized into four treatments (T): T1 (n = 18), ewes without GDF9 gene and without estrus pre-synchronization; T2 (n = 17), ewes without GDF9 gene and with estrus pre-synchronization; T3 (n = 19) ewes with the GDF9 gene and without estrus pre-synchronization, and T4 (n = 18), ewes with the GDF9 gene and with estrus pre-synchronization. Results: The presence of estrus, the onset of estrus, and returns to estrus, pregnancy, and lambing percentages were not different between treatments (p>0.05). The average pregnancy and lambing in both cases were 86.2% and the average general prolificacy was 1.4 lambs per ewe for all four treatments. There were also no significant differences for the prolificacy or fertility rate (p>0.05). Implications: The present study contributes to the understanding of the use of presynchronization with PGF2α and the effect of the presence of exon 2 of the GDF9 gene on reproductive variables. Conclusions: The presynchronization of estrus with PGF2α and the presence of exon 2 of the GDF9 gene in ewes of the Katahdin breed did not have a significant effect on the reproductive variables evaluated.https://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/4269gen de la fecundidadsincronizaciónestroprolificidadoveja. |
| spellingShingle | Dante J. Hernández-Rubio María Del Carmen Navarro-Maldonado Sergio S. González-Muñoz Martha Hernández-Rodríguez Miguel P. Conde-Hinojosa César Cortez-Romero INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE Tropical and Subtropical Agroecosystems gen de la fecundidad sincronización estro prolificidad oveja. |
| title | INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE |
| title_full | INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE |
| title_fullStr | INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE |
| title_full_unstemmed | INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE |
| title_short | INFLUENCE OF ESTRUS PRE-SYNCHRONIZATION ON REPRODUCTIVE VARIABLES IN KATAHDIN EWES CARRIERS OF THE GDF9 GENE |
| title_sort | influence of estrus pre synchronization on reproductive variables in katahdin ewes carriers of the gdf9 gene |
| topic | gen de la fecundidad sincronización estro prolificidad oveja. |
| url | https://www.revista.ccba.uady.mx/ojs/index.php/TSA/article/view/4269 |
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