DETERMINE AGE AT PUBERTY FOR AWASSI EWE LAMBS AND CROSSBREDS

J. Hadi, H.; H. M. Al-Amery, M.; A. Magid, S.

	DETERMINE AGE AT PUBERTY FOR AWASSI EWE LAMBS AND CROSSBREDS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 13, Issue 1, 2008, Pages 0-0
Authors
H. J. Hadi; M. H. M. Al-Amery; S. A. Magid
Abstract
A study was conducted to evaluate age at puberty for three genetic groups namely:pure local Awassi ;(L) , Crossbred ( 1/ 2 D’man x 1/2 Awassi ) (F1) as well as crossbred ( 3 /4 Awassi x 1 /4 D’man ) (Bc). A total of twenty four ewe lambs (10L, 8 F1 and 6 Bc) were used in this study. At the beginning of the experiment, average age was 108.8, 105.87 and 111 days and body weights were 21.1, 18.87 and 15.66 kg for L, F1 and Bc respectively. Significant differences (P<0.05) were noticed among groups of age at first estrus, which was longer for L(248‚12±58,97days).Than for F1(173,71±41,27days) and Bc (159,60±38,04 days). BC group exhibited low (P>0.05) body weight for (20,50±2,04 kg) compared with L (31,37±8,74kg) but did not differ with F1 group (21,85±5,61kg).Differences in cycle length of three genetic groups lack Significance . It is conclnded that Awassi-crossbred ewe lambs (F1, BC) have advance age at puberty with low weight than pure Awassi.

Statistics Article View: 59 PDF Download: 15