Comparing Body Weight, Body Biometrical Parameters, Blood Metabolites, and Progesterone Concentration of Ewe Lambs and Yearling Ewes

محورهای موضوعی : Camel

م. ابراهیمی ¹ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
ب. فردوست ² ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
غ. مقدم ³ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
س.ع. رافت ⁴ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
ع. حسین خانی ⁵ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
ص. علیجانی ⁶ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
ح. دقیق کیا ⁷ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )
ح. پایا ⁸ ( Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran )

تاریخ دریافت : 1397/12/27 تاریخ پذیرش : 1398/03/25 تاریخ انتشار : 1399/06/11

کلید واژه: body weight, progesterone, blood metabolites, ewe lamb,

چکیده مقاله :

Regardless of reasonable reproductive performance of ewe lambs of many breeds, Ghezel ewe lambs have a very poor fertility rate, but Ghezel yearling ewes have a high fertility rate. So, comparing ewe lambs with yearling ewes can help us to understand the reason of this difference. Accordingly, this study was designed to evaluate body weight, body biometrical parameters, serum metabolites, progesterone concentration, and trait correlations of Ghezel ewe lambs and yearling ewes. During the breeding season, Ghezel ewe lambs (n=36, 7 months old) and yearling ewes (n=39, 18 months old) were weighed, their body biometrical parameters were measured, blood samples were collected, and serum metabolites and progesterone concentrations were measured. Then, all data were analyzed by the general linear model procedure of SAS software. The results of this study indicated higher relative body weight, all body biometrical parameters (except head length), and progesterone concentration in yearling ewes in comparison with ewe lambs (p < 0.01). However, serum urea and glucose concentrations were lower in yearling ewes in comparison with ewe lambs (p < 0.05). Also, results indicated a positive correlation of relative body weight and age with progesterone concentration of yearling ewes (p < 0.01). On the other hand, results indicated a negative correlation of serum progesterone, relative body weight and age with urea concentration of yearling ewes (p < 0.05). The overall results of this study indicated that Ghezel ewe lambs had lower relative body weight, body parameters, and progesterone concentration, but higher blood glucose and urea concentrations in comparison with yearling ewes.

چکیده انگلیسی:

اگرچه بره میش‌های بسیاری از نژادها عملکرد تولید مثلی قابل قبولی دارند، بره میش‌های قزل نرخ باروری پایینی دارند، در حالیکه شیشک‌های قزل نرخ باروری بالایی دارند. بنابراین، مقایسه بره میش‌ها و شیشک‌ها می­تواند به ما در فهم این تفاوت کمک کند. در نتیجه، این مطالعه به منظور بررسی وزن بدن، فراسنجه‌های بیومتریکی بدن، فراسنجه‌های سرم، غلظت پروژسترون و همبستگی صفات بره میش‌ها و شیشک‌های قزل طراحی شد. در طی فصل تولید مثلی، بره میش‌ها (تعداد 36، متوسط سن هفت ماه) و شیشک‌های (تعداد 39، متوسط سن 18 ماه) قزل وزن­کشی شدند، فراسنجه‌های بیومتریکی بدن اندازه­گیری شدند، نمونه‌های خون جمع­آوری شده و غلظت فراسنجه‌های سرم و پروژسترون اندازه­گیری شدند. سپس، همگی داده‌ها بر اساس رویه GLM نرم افزار SAS مورد تجزیه و تحلیل قرار گرفتند. نتایج این پژوهش بالاتر بودن وزن نسبی بدن، همگی فراسنجه‌های بیومتریکی بدن (به غیر از طول سر) و غلظت پروژسترون در شیشک‌های قزل در مقایسه با بره میش‌ها را نشان دادند (P<0.01). با این حال غلظت‌های سرمی اوره و گلوکز در شیشک‌های قزل در مقایسه با بره میش‌ها پایین‌تر بود (P<0.05). همچنین نتایج همبستگی مثبت بین وزن نسبی بدن و سن با غلظت پروژسترون در شیشک‌های قزل نشان داد (P<0.01). از سوی دیگر، نتایج همبستگی منفی بین غلظت‌های پروژسترون وزن نسبی بدن و سن با غلظت اوره شیشک­های قزل نشان دادند (P<0.05). نتایج کلی این پژوهش نشان دادکه بره میش‌های قزل وزن نسبی بدن، فراسنجه‌های بدنی و غلظت پروژسترون کمتر، اما غلظت‌های اوره و گلوکز خونی بیشتر در مقایسه با شیشک‌های قزل داشتند.

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