A STUDY ON THE RELATIONSHIP BETWEEN BODY WEIGHT AND BODY DIMENSIONS OF LAMBS AT WEANING AND SELECTION OF HAMDANI EWES FOR MILK PRODUCTION

Y.Abdul-Rahman, Faris

doi:10.33899/magrj.2007.26459

	A STUDY ON THE RELATIONSHIP BETWEEN BODY WEIGHT AND BODY DIMENSIONS OF LAMBS AT WEANING AND SELECTION OF HAMDANI EWES FOR MILK PRODUCTION
Mesopotamia Journal of Agriculture
Article 12, Volume 35, Issue 1, 2007, Pages 58-67 PDF (0 K)
DOI: 10.33899/magrj.2007.26459
Author
Faris Y.Abdul-Rahman
Abstract
The relationships between body weight, body and fat tail dimensions of 119 hamdani lambs at weaning were studied. A total of 500 records of 115 hamdani ewes (test day milk yield) were analyzed. The overall mean of test-day milk yield was 0.414 kg. The effects of flock , age of dam , stage of lactation and body weight of dam on this trait were significant. Repeatability estimate for test-day milk yield was (0.52 ± 0.04) , and the estimated value of BLUP for ewe depending on milk yield ranged from (-155.56 to 214.58 gm ) for the first flock, and (-162.46 to 240.39 gm ) for the second flock. The overall mean of weaning weight (WW),body length (BL) hearth girth (HG), height at shoulder (HS) & at hip(HH) width at shoulder (WS) and at hip (WH) were 21.41 kg, 49.69 cm, 61.79 cm, 54.73 cm, 56.99 cm, 14.05 cm,16.99 cm, respectively .The overall mean of fat tail length (FL) , fat tail width (FW1) at the point of attachment with the body and at the middle point (FW2) were 13.81 cm , 20.30 cm and 23.83 cm, respectively. Positive correlation coefficients (p<0.01) were observed between all these traits. The best equation used to predict weaning weight with R=89.35 % was : WW= 29.70 + 0.35 (BL) + 0.45 (HG) + 0.27 (FW1).

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