بررسی مقاومت ژنتیکی گوسفندان نژاد قزل و آمیخته قزل-بلوچی نسبت به نماتودهای دستگاه گوارش

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه تبریز

2 گروه علوم دامی دانشکده کشاورزی دانشگاه تبریز

3 پاتوبیولوژی، دانشکده دامپزشکی، دانشگاه تبریز

چکیده

زمینه مطالعاتی: امروزه در کنار صفات تولیدی، ویژگی­های مقاومت ژنتیکی دام نیز مورد توجه اصلاح گران قرار گرفته است و علاقمندی به استفاده از قابلیت­های ژنتیکی حیوان برای مقابله با بیماری­ها و انگل­ها فزونی یافته است. هدف: هدف از اجرای این طرح، بررسی مقاومت نسبی گوسفندان ن‍‍‍ژاد قزل و دو رگه های قزل- بلوچی در استان آذربایجان شرقی نسبت به انگل­­های داخلی بود. روش کار: اطلاعات تحقیق از 24 رأس گوسفند یکساله حاصل از دو ترکیب ژنتیکی بدست آمد. گروه­های ژنتیکی شامل 12 رأس گوسفند نژاد قزل و 12 رأس گوسفند آمیخته­ی ­قزل-بلوچی بود. نمونه گیری در دو نوبت و در تاریخ­های 30/11/1390 و 14/12/1390 در ایستگاه تحقیقاتی خلعت پوشان انجام گرفت. تمامی گوسفندان متولد زمستان 1389 بودند و همه­ی آنها در شرایط محیطی یکسان قرار داشتند. صفات مورد بررسی شامل وزن بدن، تعداد تخم نماتودها در هر گرم مدفوع، هماتوکریت و تست فماچا بودند. داده های وزن تولد و هماتوکریت توسط رویه­ی GLM  و بقیه صفات توسط رویه­ی MIXED نرم افزارSAS آنالیز شد. نتایج: نتایج بدست آمده نشان داد که اثر گروه ژنتیکی در مورد کل تخم نماتودهای موجود در هر گرم مدفوع، تست فماچا و هماتوکریت ، تخم نماتودیروس و مارشالاژیا  معنی­دار است(P<0.05). دورگ گیری قزل با بلوچی موجب افزایش مقاومت نسبی به نماتودهای دستگاه گوارش از لحاظ صفات اندازه گیری شده در این تحقیق است ولی دلیل ژنتیکی برتری دورگ ها نسبت به نژاد خالص و آگاهی از ماهیت پلی ژنی یا اثرات غیر افزایشی نیاز به تحقیقات بیشتر دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Genetic resistance of Ghezel and Ghezel-Baluchi crossbred lambs to gastro-internal nematodes

نویسندگان [English]

  • J Habashizadeh 1
  • SA Rafat 2
  • Gh Moghaddam 1
  • A Nematollahi 3
  • J Shodja 1
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