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

Subject Areas : Parasitology

khosro parsaeimehr ¹ (tabriz university)
habib cheraghi ² (گروه علوم‌دامی، دانشگاه تبریز، تبریز، ایران)
gholamali mogaddam ³ (گروه علوم‌دامی، دانشگاه تبریز، تبریز، ایران)

Received: 2022-12-05 Accepted : 2023-03-06 Published : 2023-03-19

Keywords: lamb, crossbred, disease, Nematodes, Famacha test,

Abstract :

The purpose of this project is to investigate the genetic resistance of Ghezel and Ghezel-Romanov lamb to gastrointestinal parasites in East Azerbaijan province. For this study, were used 10 male and female Ghezel lambs and 10 male and female Ghezel-Romanov lambs. The anti parasitic drug was administered on day of the test and then 2 weeks later. The studied traits included: Famacha test, hematocrit test, fecal score and number of nematode eggs per gram of feces. Data were analyzed using SAS software in a completely randomized design. The results showed that the Famacha test was significant in male and female Ghezel and Ghezel-Romanov mixed breeds (p<0.05). number of nematode eggs in male and female Ghezel-Romanov lambs had a significant decrease compared to Ghezel lambs (p<0.05). number of parasite eggs in Ghezel-Romanov lambs was lower than Ghezel breed, in which male Ghezel-Romanov lambs had the lowest number of parasite eggs (16.2) (p<0.05). Crossbreeding of Ghezel and Romanov increases the relative resistance to gastrointestinal nematodes in terms of traits measured in this study.