Environmental and Genetic Factors Affecting Early Growth Traits in Three Yemeni Indigenous Sheep Breeds
الموضوعات :
1 - Department of Animal Husbandry and Dairying, Institute of Agricultural Science, Banaras Hindu University, Varanasi, 221005, India
2 - Department of Animal Husbandry and Dairying, Institute of Agricultural Science, Banaras Hindu University, Varanasi, 221005, India
الکلمات المفتاحية: genetic parameters, growth traits, environmental effect, yemeni indigenous sheep,
ملخص المقالة :
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 11.14 kg for weaning weight (WW) and 114.91, 98.68 and 106.04 g for growth rate in Barri, Black Boni and White Boni sheep, respectively. Year of birth effects were significant (P<0.05) on BW, WW and growth rate in all the breeds. Also, analysis of variance showed that the sex of the lambs and the type of birth were important sources of variation (P<0.05) in the three breeds for all traits. The size of the ewe during lambing had also significant effect (P<0.01) on birth in all the breeds. The results show direct heritability for all traits, it was varied between 0.36 and 0.38 for BW, 0.30 and 0.35 for WW, 0.26 and 0.36 for growth rate in all breeds. HHHHvgigher estimates of heritability for growth performance traits are refers to the presence of more additive genetic variance.
Abbas S.F., Abd Allah M., Allam F.M. and Abooul-Ella A.A. (2010). Growth performance of Rahmni and Chios lambs weaned at different ages. Austr. J. Basic Appl. Sci. 4, 1583-1589.
Albial A.M., Al-Karmah A., Al-Ashwal M., Alazazie S., Alshami A. and Sharaf R. (2010). Performance of White Boni sheepYemeni 1. Some of non-genetic factors influencing growth traits. Egypt J. Appl. Sci. 25, 432-442.
Alnohkaif A. (1999). Estimation of genetic and non-genetic parameters for some growth traits in Dhamari hair sheep. MS Thesis. Faculty of Agricultural. Sana’a University.
Al-Shorepy S.A. (2001). Estimates of genetic parameters for direct and maternal effects on birth weight of local sheep in United Arab Emirates. Small Rumin. Res. 39, 219-224.
Al-Shorepy S.A. and Notter D.R. (1996). Genetic variation and covariation for ewe reproduction, lamb growth, and lamb scrotal circumference in a fall-lambing sheep flock. J. Anim. Sci. 74, 1490-1498.
Behzadi R., Shahroudi F.E. and Van Vleck L.D. (2007). Estimates of genetic parameters of growth traits in Kermani sheep. J. Anim. Breed. Gen. 5, 296-301.
Boldman K.L. (1993). A Manual for Use of MTDFREML. A set of programs to obtain estimates of variances and covariances (DRAFT). U.S. Department of Agriculture, Research Service.
Dixit S.P., Dhillon J.S. and Singh G. (2001). Genetic and non-genetic parameters for growthtraits of Bharat Merino lambs. Small Rumin. Res. 42, 101-104.
El Fadili M., Michaux C., Detilleux J. and Leroy P.L. (2000). Genetic parameters for growth traits of the Moroccan Timahdit breed of sheep. Small Rumin. Res. 37, 203-208.
Gamasaee V.A., Hasan S., Ahmadi H.A., Baneh H., Farhadi A. and Mohamadi A. (2010). Estimation of genetic parameters for body weight at different ages in Mehraban sheep. Afr. J. Biotechnol. 32, 218-223.
Gbangboche A.B., Youssao A.K.I., Senou M., Adamou-Ndiaye M., Ahissou A., Farnir F., Michaux C., Abiola F.A. and Leroy P.L. (2006). Examination of nongenetic factors affecting the growth performance of Djllanke sheep. Trop. Anim. Health. Prod. 38, 55-64.
Ghafouri Kesbi F., Eskandearinasab M. and Hassanabadi A. (2008). Estimaation of genetic parameters for lamb wieght at various age in Mehraban sheep.Ital. J. Anim. Sci. 22, 95-103.
Hasanain H.U., Alnokhaif A.A. and Aliryani A.R. (1994). Sheep and cattle in yemen. Anim. Gen. Res. Info. 13, 59-63.
Mandal A., Pant K.P., Nandy D.K., Rout P.K. and Roy R. (2003). Genetic analysis of growth traits in Muzaffarnagari sheep. Trop. Anim. Health. Prod. 35, 271-284.
Mishra A.K., Arora A.L., Kumar S. and Singh V.K. (2007). Improving productivity of Malpura breed by crossbreeding with prolific Garole sheep in India. Small Rumin. Res. 70, 159-164.
Petrovic M.P., Muslic R.D., Petrovic V.C. and Makshimovic N. (2011). Influence of environmental factors on birth weight variability of indigenous Serbian breeds of sheep. Afr. J. Biotech. 10, 673-676.
Rajab M.H., Cartwright T.C., Dahm P.F. and Figueiredo E.A. (1992). Performance of three tropical hair sheep breeds. J. Anim. Sci. 11, 3351-3359.
Rashidia A., Mokhtarib M.S.,Safi Jahanshahic A. and Abadid M.R. (2008). Genetic parameter estimates of pre-weaning growth traits in Kermani sheep. Small Rumin. Res. 74, 165-171.
SAS (2004). User’s Guide. Statistical Analysis System Institute, Inc. Cary, NC, USA.
Thiruvenkadan A.K., Karunanithi K., Muralidharan J. and Narendra Babu R. (2009). A comparative study on geowth performance of crossbred and purebred Mecheri sheep raised under dry land farming condition. Afr. J. Anim. Sci. 39, 121-125.
Wilson R.T. (2003). Biodiversity of domestic of livestock in republic of Yemen. Trop. Anim. Health. Prod. 35, 27-46.
Yemen Agricultural Statistics. (2009). General Department of statistics and documentation. Ministry of Agriculture and Water Resource. Republic of Yemen.
