Investigation of Inbreeding in Baluchi sheeps of Abbasabad Breeding Station

پژوهشهای علوم دامی ایران

Article 15, Volume 3, Issue 4 - Serial Number 8, December 2011   

Document Type: Scientific - Research Articles

DOI: 10.22067/ijasr.v3i4.12553

Authors

Mohammadreza Sheikhlou^* ; Mojtaba Tahmoorespur; Ali Asghar Aslaminejad

Department of Animal Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

In this study 21721 pedigree records of Iranian Baluchi sheep registered during 30 years (1979 to 2008) at
Abasabad breeding station were used to estimate pedigree completeness level, inbreeding and average
relationship coefficients of animals. During the studied years pedigree completeness level has a positive trend
with the most recent cohort of lambs born in 2008 having pedigrees with 6.2 equivalent generations of known
ancestors. Also, average inbreeding coefficient increased in these years and linear regression of inbreeding on
year of birth resulted in an estimated rate of inbreeding of 0.15 %/yr. Inbreeding of number 2 flock was higher
than that was in number one (P

Keywords

Sheep; Inbreeding; Relationship coefficient; Pedigree completeness level 1; 2; 3-