ESTIMATION OF SOME GENETIC AND NON GENETIC PARAMETERS FOR BODY WEIGHT AND SCROTAL SIZE IN AWASSI RAM LAMBS

AL-Hassan, Falah

doi:10.33899/magrj.2018.161422

	ESTIMATION OF SOME GENETIC AND NON GENETIC PARAMETERS FOR BODY WEIGHT AND SCROTAL SIZE IN AWASSI RAM LAMBS
Mesopotamia Journal of Agriculture
Article 12, Volume 46, Issue 1, 2018, Pages 107-114 PDF (368.82 K)
Document Type: Research
DOI: 10.33899/magrj.2018.161422
Author
Falah AL-Hassan^*
Animal Breed. Stat. Mosul, College of Agriculture and Forestry, Mosul University. Iraq
Abstract
This study was carried out on Awassi sheep in two flocks: the first the flock of college of Agriculture and Forestry/ University of Mosul and the second flock of AL- Rashidia Animal Breeding for two years. A hundred and five ram lambs were used in this study , body weight and scrotal size were measured at 4 , 5 , 6 and 7 months of age. The results showed a non significant effect of year of birth on body weight, the ram lambs of AL-Rashidia flock were significant succeeded in their body weight, a significant differences were found in body weight of ram lambs at 4 months of age due to age of dam, and the single were better significantly than twins in body weight at 4 months of age only. There were a significant effect of year of birth on scrotal size at 5, 6 and 7 months of age , the effect of flock was a significant on scrotal size at all ages , s significant differences were found in scrotal size at 5 and 6 months of age due to age of dam , in other hand no significant effects was observed for type of birth on scrotal size at all ages. Heritabity estimates at 4 , 5 , 6 and 7 months of age were (0.58 , 0.64 , 0.52 and 0.44) for body weight and (0.30 , 0.22 , 0.21 and 0.31)for scrotal size respectively , all genetic and phenotypic correlations between the studied traits were positive and highly significant.
Keywords
: Scrotal volume; heritability; fixed factors

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