نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری،گروه علوم دامی، دانشکده علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان، ملاثانی، اهواز، ایران

2 استادیار،گروه علوم دامی، دانشکده کشاورزی، دانشگاه تبریز، تبریز، ایران

3 استاد،گروه علوم دامی، دانشکدۀ علوم دامی و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان

4 استادیار،گروه علوم دامی، دانشکده کشاورزی، دانشکاه تبریز، تبریز، ایران

5 دانش آموخته دکتری تخصصی، شرکت نهاده های دامی جاهد، تهران، ایران

چکیده

هدف از پژوهش حاضر تأثیر انتخاب علیه سندرم آسیت بر صفات مختلف رشد بدن، اندام‌های داخلی و پارامترهای خونی در یک لاین مرغ گوشتی بود. بنابراین با طبقه‌بندی خانواده‌های مختلف بر اساس فراوانی بروز آسیت تحت تنش‌‌سرمایی (جمعیت آزمون)، تعداد 10 خانواده‌ حساس و 10 خانواده مقاوم به آسیت انتخاب و مجموعه نتاج دیگری از همان خانواده‌ها (جمعیت تأیید) تحت شرایط نرمال پرورش داده شدند. این رویه در دو نسل مجزا تکرار شد. برای بررسی ارتباط ژنتیکی صفات بین دو جمعیت آزمون و تأیید از آماره همبستگی و برای بررسی معنی‌داری تفاوت فراوانی شیوع سندرم آسیت بین خانواده‌های حساس و مقاوم از آزمون کای-‌اسکوئر و برای بررسی معنی‌داری تفاوت بین صفات مختلف در گروه‌های حساس و مقاوم از رویه GLM نرم افزار SAS (نسخه 9/1) استفاده شد. همبستگی بین وقوع آسیت در خانواده‌های مختلف در دو شرایط پرورشی نشان داد که خانواده‌هایی که تحت تنش‌سرمایی آسیت زیادتری نشان دادند، تحت شرایط نرمال نیز آسیت بیشتری داشته‌اند. بررسی مقایسه‌ای صفات مختلف در گروه‌های حساس و مقاوم نشان داد که در خانواده‌های حساس وزن بدن و نرخ رشد و ظرفیت تنفسی پایین‌تر و درصد هماتوکریت و فشار جزئی دی‌اکسیدکربن خون به طور معنی‌داری بالاتر از خانواده‌های مقاوم بود (p<0/05). در پژوهش حاضر علاوه بر شناسایی دلایل حساسیت به سندرم آسیت در جوجه‌های گوشتی، نشان داده شد که انتخاب علیه این سندرم نه تنها باعث افت رشد در لاین گوشتی مورد مطالعه نمی‌شود بلکه موجبات بهبود همزمان صفات رشد و مقاومت به این سندرم در لاین مورد نظر را فراهم می‌آورد.

کلیدواژه‌ها

عنوان مقاله [English]

The effect of successful phenotypic selection against ascites syndrome on different traits in a commercial broiler line

نویسندگان [English]

  • Maryam Karami 1
  • Karim Hasanpur 2
  • Jamal Fayazi 3
  • Arash Javanmard 4
  • Hamid Varnaseri 5

1 Department of Animal Science , Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran.

2 Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran

3 Department, of Animal Science. Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran.

4 Department of Animal Science, Faculty of Agriculture, University of Tabriz,, Tabriz,, Iran

5 Nahadehay Dami Jahed (NDJ) company, Tehran, Iran

چکیده [English]

The aim of present study was to investigate the effect of selection against ascites syndrome on different traits body growth, internal organs, and blood
parameters in a broiler line. Therefore, by classifying different families based on the frequency of ascites under intense ascites inducing condition
(AIC), 10 susceptible families (SUS) and 10 resistant families (RES) to ascites were selected and another set of offspring from the same families were
bred under normal commercial condition (NCC). This process of selection and cross validation was carried out twice in the two distinct generations.
The genetic relationship of different traits, the difference in the frequency of ascites between AIC and NCC, and the difference between different traits
in SUS and RES were performed by correlation statistics, Chi-square test, and GLM procedure of SAS software (version 9.1), respectively. The
correlation between ascites susceptibility in different families indicated that families that showed more ascites under AIC also had more ascites under
NCC. Comparative study of different traits in susceptible and resistant groups showed that in SUS, body weight, growth rate and respiratory capacity
were significantly lower and blood partial pressure of carbon dioxide was significantly higher than RES (P<0.05). In the present study it was shown
that selection against this syndrome not only does not reduce growth rate in the investigated broiler line, but also improves growth traits and resistance
to this syndrome in the mentioned line.

کلیدواژه‌ها [English]

  • chicken
  • Growth-related traits
  • Pulmonary hypertension syndrome
  • Resistance
  • Water-belly
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