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The effect of equine chorionic gonadotrophin (ecg) injection combined with prostaglandin F2α (pGF2α) and gonadotrophin releasing hormone (GnRH) treatment on reproductive performance of Zandi ewes during non-breeding season | ||
| Archives of Razi Institute | ||
| مقاله 7، دوره 71، شماره 4، اسفند 2016، صفحه 269-279 اصل مقاله (133.05 K) | ||
| نوع مقاله: Original Articles | ||
| شناسه دیجیتال (DOI): 10.22034/ari.2016.107512 | ||
| نویسندگان | ||
| A. Hosseinzadeh Aski1؛ R. Masoudi* 2؛ A. Zare Shahneh2؛ S. Asadzadeh1؛ E. Dirandeh3؛ H. Sadeghipanah4 | ||
| 1Department of Animal Science, Faculty of Veterinary, Islamic Azad University, Ghaemshahr Branch, Ghaemshahr, Iran | ||
| 2Department of Animal Science, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran | ||
| 3Department of Animal Science, Faculty of Agriculture, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran | ||
| 4Animal Science Research Institute, Karaj, Iran | ||
| چکیده | ||
| In this study, we aimed to investigate reproductive performance in estrus-induced Zandi ewes treated with equine chorionic gonadotrophin (eCG) injection in combination with prostaglandin F2α (PGF2α)and gonadotrophin releasing hormone (GnRH) during non-breeding season. The estrous cycle was synchronized using controlled internal drug release (CIDR) for 12 days. The ewes were randomly assigned to five groups (n=100 in each group). The first group (control) did not receive hormone injection, the second group (eCG) received 400 IU of eCG at the time of CIDR removal, the third group (eCG+PGF2α) received 400 IU of eCG and 1 ml of PGF2α at the time of CIDR removal, the fourth group (eCG+GnRH) received 400 IU of eCG at the time of CIDR removal and 1 ml of GnRH injection on the day of insemination, and the fifth group (eCG+PGF2α+GnRH) received 400 IU of eCG, 1 ml of PGF2α at the time of CIDR removal, and 1 ml of GnRH on the day of insemination. The results showed that the heat response rate was higher in all the groups receiving hormonal injections compared with the control group (P<0.05). In addition, the lambing and parturition rateswere significantly (P<0.05) higher in the groups receiving GnRH compared with other treatments.In fact, in groups receiving eCG and PGF2α, lambing and parturition rateswere higher than the control group (P>0.05). In conclusion, use of eCG at the time of CIDR removal and GnRH on the day of insemination increased reproductive performance. Therefore, it can be applied as a strategy for increasing lambing rate in ewes. | ||
| کلیدواژه‌ها | ||
| Lambing rate؛ eCG؛ GnRH؛ PGF2α؛ Zandi ewes | ||
| عنوان مقاله [English] | ||
| اثر تزریق eCG به همراه PGF2α و GnRH بر عملکرد تولیدمثلی میش های زندی در خارج فصل تولیدمثل | ||
| نویسندگان [English] | ||
| علیرضا حسین زاده اسکی1؛ رضا مسعودی2؛ احمد زارع شحنه2؛ سکینه اسدزاده1؛ عیسی دیرنده3؛ حسن صادقی پناه4 | ||
| 1گروه علوم دامی، دانشکده دامپزشکی، دانشگاه آزاد اسلامی گرمسار، گرمسار، ایران | ||
| 2گروه علوم دامی، دانشکده کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران | ||
| 3گروه علوم دامی، دانشکده کشاورزی، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران | ||
| 4موسسه تحقیقات علوم دامی، کرج، ایران | ||
| چکیده [English] | ||
| هدف از این پژوهش بررسی اثر تزریق هورمونهای eCG، PGF2α و GnRH بر بهبود درصد باروری میشهای نژاد زندی همزمان سازی شده با سیدر در خارج فصل تولید مثل بوده است تا بتوان بازده تولید مثلی را در این دام بومی ایران افزایش داد. در این پژوهش 500 راس میش نژاد زندی که در شرایط تغذیه‌ای یکسان قرار داشتند در خارج تولید مثل انتخاب و برای همزمانسازی فحلی به مدت 12 روز سیدرگذاری شدند. سپس میشها به 5 گروه مساوی (100 راسی) تقسیم شدند. به میشهای گروه اول هورمونی تزریق نشد. به میشهای گروه دوم همزمان با برداشت سیدر 400 واحد eCG تزریق شد. به میشهای گروه سوم همزمان با برداشت سیدر 400 واحد eCG و یک میلیلیترPGF2α تزریق شد. به میشهای گروه چهارم همزمان با برداشت سیدر مقدار400 واحد eCG و در روز چهاردهم یک میلیلیتر GnRH تزریق شد. به میشهای گروه پنجم همزمان با برداشت سیدر مقدار400 واحد eCG، یک میلیلیترPGF2α و در روز چهاردهم یک میلیلیتر GnRH تزریق شد. تمامی میشها 54 ساعت پس از سیدربرداری تلقیح مصنوعی شدند. نتایج نشان داد که درصد فحلی در تمامی گروههای دریافت کننده تیمارهای هورمونی از گروه کنترل بالاتر بوده است (05/0>P) ولی بین تیمارها اختلاف معنیداری وجود نداشت (05/0P). همچنین درصد آبستنی، زایش و برهزایی در گروههای دریافت کننده eCG و PGF2α نیز نسبت به گروه کنترل بالاتر بود (05/0>P). در نتیجه با استفاده از تزریق eCG در هنگام سیدر برداری و GnRH در روز تلقیح مصنوعی میتوان بازده تولیدمثلی را در گوسفندان نژاد زندی در خارج فصل تولیدمثلی بهبود بخشید. | ||
| کلیدواژه‌ها [English] | ||
| درصد برهزایی, میش زندی, eCG, GnRH, PGF2α | ||
| مراجع | ||
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