Identification of Environmental Factors Affecting Pre Weaning Performance of Mengali Sheep of Balochistan
نویسندگان
چکیده
The objectives of the present study were to analyze different environmental factors affecting pre-weaning growth performance of Mengali sheep. Performance records on 2377 lambs in four flocks maintained at Experimental Station, Centre for Advanced Studies in Vaccinology and Biotechnology, Quetta (ESC), Mastung, Nushki and Quetta area over a period of 5 years (Jan 2005 to Dec 2009) were analysed. Body weights at birth (BW), 30 days (1MW), 60 days (2MW), 90 days (3MW), 120 days Weaning weight, (WW), and pre-weaning average daily gain (PRADG) were evaluated. Location of flock, year of birth (YOB), season of birth (SOB), type of birth (TOB), sex and their interactions were the fixed effects in the model. The overall average values for BW, 1MW, 2MW, 3MW, WW, and PRADG were found as 3.54±0.37, 7.96±0.91, 11.77±1.83, 15.51±2.86, 19.16±3.23 kg, and 135.00±0.26 g, respectively. Location of flock, sex, and TOB had significant influences (P<0.05) on weights at all ages. However, YOB*SOB and TOB*sex had non significant effects (P>0.05) on weights at all ages. Flock kept at ESC (Quetta) location showed better performance for all traits as compared to other flocks. The difference might be attributed to regular supplementation of ration to this flock. Male lambs were heavier than female lambs, and single born lambs were also significantly heavier than twins (P<0.05) at birth. Results reflected that Mengali breed can be improved through selection and better management.
منابع مشابه
Environmental and Genetic Factors Affecting Early Growth Traits in Three Yemeni Indigenous Sheep Breeds
The data were collected from 1992 to 2009 in Burri, White Boni and Black Boni sheep maintained at the Regional Research Station in the Central Highlands of Yemen. Data were analyzed to study the effects of environmental and genetic factors on body weight and growth rate from birth to weaning. The least square means for body weights (BW) were 2.54, 2.18 and 2.26 kg for birth; 12.49, 10.58 and 11...
متن کاملCrossbreeding of iranian fat-tailed sheep III. the relationships of pre-and post-weaning growth performance of lambs
متن کامل
Bimolecular identification of M.ovinpeumoniae from nasal swab samples of sheep from various districts of Balochistan, Pakistan
Mycoplasma ovipneumoniae is an important respiratory pathogen of sheep across the world. In the present study nasal swab samples (n=778) were processed and 51isolates of M. ovipneumoniae were identified through biochemical tests and PCR. Difference in the isolation rate among districts (n=12), age groups (n=3), breads (n=6) was assessed. Similarly the isolate rate among healthy (n=513) and resp...
متن کاملBimolecular identification of M.ovinpeumoniae from nasal swab samples of sheep from various districts of Balochistan, Pakistan
Mycoplasma ovipneumoniae is an important respiratory pathogen of sheep across the world. In the present study nasal swab samples (n=778) were processed and 51isolates of M. ovipneumoniae were identified through biochemical tests and PCR. Difference in the isolation rate among districts (n=12), age groups (n=3), breads (n=6) was assessed. Similarly the isolate rate among healthy (n=513) and resp...
متن کاملGenetic Parameters of Direct and Maternal Effects for Growth Traits of Afshari Sheep
The genetic parameters and (co) variance components of body weight at birth (BW), weaning (WW) and six months of age (BW6) and average daily gain (ADG) pre and post-weaning of Afshari sheep were estimated using restricted maximum likelihood (REML) methodology and animal model implemented in DFREML software. The likelihood ratio test (LRT) was used to compare the models. Year of birth, age of mo...
متن کامل