Opis

• Tytuł:
  THE EFFICIENCY OF TWO SYNCHRONIZATION PROTOCOLS ON INDIGENOUS BREEDS OF CATTLE IN NIGERIA
• Twórca:
  Olorunleke, Solomon
• Opis:
  Oestrous synchronization and artificial insemination (AI) have been identified as key assistedreproductive technology tools in the breed improvement and livestock transformation agendain Nigeria. This study aimed at demonstrating the efficiency of the Ovsynch protocol anddouble dose of prostaglandin F2α (PGF2α) administered 11 days apart in the two majorbreeds (Sokoto Gudali and White Fulani) of cattle in Nigeria. Sixty cows comprising 30 SokotoGudali (Bokolo) and 30 White Fulani (Bunaji) with a history of calving were selected for thestudy. On days 0, 7 and 9, GnRH, Prostaglandin F2α and GnRH were administered to the firstgroup (group A) while the second group (group B) received PGF2α on days 0 and 11respectively. Blood for the hormonal assay was collected from the jugular vein aseptically ondays 0,7, 9, 11, 12, 13, and 14. The vaginal electrical resistance (VER) profiling with theDraminski oestrous detector commenced 24 hours after the second GnRH and PGF2αinjection for groups A and B respectively. The VER reading was taken twice daily until thetime of insemination. The follicular dynamics were done using the Draminski Animal Profi 2ultrasound scanner and the follicular sizes were measured daily until the Graafian follicleruptured. The conception rate was determined 50 days post-artificial insemination procedure.The mean blood oestrogen levels ranged from 54.5 to 121.7 pmol/L and 30.7 to 111 pmol/Lfor cows in groups A and B respectively. The mean blood progesterone levels ranged from 0.7to 5.5 nmol/L and 1.7 to 8.5 nmol/L in group A and B cows respectively. The vaginal electricalresistance pattern in both breeds was similar; however, the predicted time of ovulationvaried greatly between breeds regardless of the synchronization protocol used. The sizes ofthe follicles in Bunaji were relatively larger than those of the Bokolo breed. The time durationbetween the last hormonal treatment and the time of ovulation/ insemination varied greatlyfrom the standard Ovsynch protocol and between breeds. In general, the conception ratevaried between the breeds, with 95.23% and 75% conception achieved in Bunaji and Bokolobreeds respectively.We observed that cows in group A ovulated after 72 and 84 hours for Bunaji and Bokolobreeds of cows respectively, hence the fixed time AI of Ovsynch protocol should be eithermodified (from 8 – 20 hours to 72 – 96 hours) or each cow should be individually profiled ifpregnancy is desired in these indigenous breeds of cows.
• Dostępność obiektu:
  Dostęp otwarty
• Prawa: https://creativecommons.org/licenses/by-nd/4.0 ;
  Prawa autorskie (c) 2025 Olorunleke S.O
• Data:
  2023.07.09
• Typ:
  info:eu-repo/semantics/article;
  info:eu-repo/semantics/publishedVersion
• Język:
  angielski
• Źródło:
  Translational Research in Veterinary Science; Vol. 6 No. 1 (2023); 16;
  Translational Research In Veterinary Science; Tom 6 Nr 1 (2023); 16;
  2657-4489
• Format:
  application/pdf
• Wydawca:
  Nicolaus Copernicus University in Toruń
• Relacja: https://apcz.umk.pl/TRVS/article/view/63750/43284
• Temat i słowa kluczowe:
  Artificial Insemination;
  oestrus synchronization;
  follicular dynamics;
  ultrasonography;
  Nigerian cattle breed
• Identyfikator: https://apcz.umk.pl/TRVS/article/view/63750
• Dostawca danych:
  Akademicka Platforma Czasopism
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