مقایسه سیدر با تزریقات پروژسترون و eCG با FSH نوترکیب انسانی برای همزمانی فحلی گوسفند

نوع مقاله : مقاله کامل

نویسندگان

10.22099/ijvr.2024.49344.7239

چکیده

پیشینه: در برنامه‌های همزمانی فحلی در گوسفند، پرهیز در استفاده از ابزارهای داخل واژنی و کوتاه نمودن برنامه از 14 به 6 روز، از اقدامات موثر برای اقتصادی نمودن برنامه، بهداشت و سلامت دام و صرفه جویی در زمان بشمار می‌روند. همچنین، جایگزینی eCG با یک گنادوتروپین مطمئن و ارزان می‌تواند به عنوان یک درخواست جهانی محسوب شود. هدف: این مطالعه با هدف جایگزینی FSH نوترکیب انسانی با eCG، در برنامه‌های همزمان سازی فحلی گوسفند مبتنی بر سیدر (14 روزه) و یا تزریقات پروژسترون (6 روزه) صورت پذیرفت. روش کار: میش‌های نژاد اصف و لاکون (170 راس) به دو گروه تقسیم شده و نیمی از آن‌ها برای مدت 14 روز سیدرگذاری شدند و نیمی دیگر با استفاده از تزریقات پروژسترون همزمان شدند. میش‌های دریافت کننده تزریقات پروژسترون، در روز صفر آزمایش، پروژسترون (5/37 میلی‌گرم، زیرجلدی) و GnRH (5/7 میکروگرم آلارلین استات، عضلانی) دریافت داشتند. در روزهای سوم و ششم به ترتیب 25 و 5/12 میلی‌گرم پروژسترون (زیرجلدی) تزریق گردید. در روز ششم، میش‌های هر دو گروه، پروستاگلاندین F2α (250 میکروگرم کلوپروستنول، عضلانی) دریافت داشتند و برای دریافت FSH نوترکیب انسانی (75 واحد بین المللی فولیتروپین آلفا، زیرجلدی) و یا 400 واحد بین المللی eCG (عضلانی) به دو زیرگروه تقسیم شده شدند. در روز هفتم، میش‌ها برای مدت 21 روز در مجاورت قوچ‌های بارور قرار گرفتند. آنالیز آماری با رویه Glimmix و GLM انجام شد. نتایج: هیچگونه تفاوت معنی‌داری در نرخ بره‌زایی، دوقلوزایی و تزاید گله بین گروه‌های سیدر (1/77، 63/1، و 16/1%) و پروژسترون تزریقی (7/66، 55/1 و 03/1%) و همچنین بین میش‌های درمان شده با eCG (4/71، 60/1، و 14/1%) و FSH نوترکیب انسانی (3/66، 58/1، و 05/1%) مشاهده نشد (P<0.05). نتیجه‌گیری: برنامه شش روزه همزمانی فحلی مبتنی بر تزریقات پروژسترون می‌تواند جایگزین مناسبی برای برنامه چهارده روزه سیدر بشمار رود. همچنین، از FSH نوترکیب انسانی می‌توان به عنوان جایگزین مناسبی برای eCG در برنامه‌های همزمان سازی فحلی گوسفند استفاده نمود.

کلیدواژه‌ها

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