Estimation of Genetic Parameters for Growth and Body Measurement Traits in Different Ages in Iranian Makuei Sheep
محورهای موضوعی : Camelش. ورکوهی 1 , ح. بانی-سعادت 2 , س. رزاق-زاده 3
1 - Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah, Iran
2 - Department of Animal Science, Faculty of Agriculture, Razi University, Kermanshah, Iran
3 - Animal Science Research Institute, West Azarbayjan, Urmia, Iran
کلید واژه: heritability, genetic correlation, sheep breeding programs,
چکیده مقاله :
The present study aimed to estimate heritability, genetic and phenotypic correlations between body weight and body measurement traits in Iranian Makuei sheep. The used data were collected from 1989 to 2012 at Makuei Sheep Breeding Station in Maku (West Azarbayjan province). The data included body weight and five body measurement traits (body length (BL), heart girth (HG), withers height (WH), rump height (RH) and leg circumference (LC)) in 6, 12 and 18 months of age with 400, 900 and 350 records in different time, respectively. The data were analyzed using multi-trait animal model through DFREML software. Results showed that the estimated heritabilities for body weight and body measurement traits in 12 months of age is less than those for 6 and 18 months of age; those comes down from 6 to 12 months of age, then go up to 18 months of age. In six months of age the highest and lowest genetic correlations were between body weight (BW) with WH and LC; respectively, and the highest and lowest phenotypic correlations were between BW with RH and LC; respectively. Genetic and phenotypic correlations between body weight in six months of age and body measurement traits were approximately high but with leg circumference were low. Genetic correlations in 12 months of age were generally higher than phenotypic correlations. Genetic correlations between body weight in 18 months of age and body measurement traits were moderate to high and the highest genetic correlation was found between body weight in 18 months of age and body length. The positive correlation between body weight and body measurements in different ages indicated that selection for body measurements would results body weight improvement.
هدف از مطالعه اخیر تخمین وراثتپذیری و همبستگیهای ژنتیکی و فنوتیپی بین صفات وزن و ابعاد بدن در گوسفندان نژاد ماکویی ایران می‌باشد. داده‌های مورد استفاده از ایستگاه پرورش گوسفند ماکویی (استان آذربایجان غربی) بین سال‌های 1368 تا 1392 جمعآوری شد. داده‌ها شامل صفات وزن بدن و ابعاد بدن (طول بدن، دور سینه، ارتفاع از جدوگاه، ارتفاع از کفل، و دور ران) در سنین 6، 12 و 18 ماهگی به ترتیب 400، 900 و 350 رکورد بود. آنالیز داده‌ها با استفاده از مدل حیوانی چند صفتی از طریق نرم افزار DFREML انجام شد. نتایج نشان داد که تخمین وراثتپذیری برای وزن و ابعاد بدن در سن 12 ماهگی کمتر از 6 و 18 ماهگی بود، بطوریکه از سن 6 تا 12 ماهگی کاهش، سپس تا 18 ماهگی افزایش یافت. در سن 6 ماهگی بیشترین و کمترین همبستگی ژنتیکی بین وزن بدن با ارتفاع از جدوگاه و دور ران بود و کمترین و بیشترین همبستگی فنوتیپی بین وزن بدن با ارتفاع از کفل و دور ران بود. همبستگیهای ژنتیکی و فنوتیپی بین وزن بدن و ابعاد بدن در 6 ماهگی تقریباً بالا بود ولی این همبستگیها با صفت دور ران پایین بود. بطورکلی همبستگیهای ژنتیکی در سن 12 ماهگی بیشتر از همبستگیهای فنوتیپی بود. همبستگیهای ژنتیکی بین وزن بدن و ابعاد بدن در سن 18 ماهگی متوسط به بالا بود و بیشترین همبستگی ژنتیکی بین وزن بدن و طول بدن یافت شد. همبستگی مثبت بین وزن بدن و ابعاد بدن در سنین مختلف نشان داد که انتخاب برای ابعاد بدن باعث بهبود وزن بدن می‌شود.
Abbasi M.A. and Ghafouri-Kesbi F. (2011). Genetic (co)variance components for body weight and body measurements in Makooei sheep. Asian-Australasian J. Anim. Sci. 24, 739-743.
Bahreini-Behzadi M.R., Shahroudi F.E. and Van vleck L.D. (2007). Estimates of genetic parameters for growth traits in Kermani sheep. J. Anim. Breed. Genet. 124, 296-301.
Bathaei S.S. and Leroy P.L. (1998). Genetic and phenotypic aspects of the growth curve characteristics in Mehraban Iranian fat-tailed sheep. Small Rumin. Res. 29, 261-269.
Brown J.E., Brown C.J. and Butts W.T. (1973). Evaluating relationships among immature measures of size, shape and performance of beef bulls. J. Anim. Sci. 36, 1010-1020.
Cankaya S. and Kayaalp G.T.(2007). Estimation of relationship between live weights and some body measurements in German farm × hair crossbred by canonical correlation analysis. J. Anim. Prod. 48, 27-32.
Hamayun Khan F.M., Ahmad R., Nawaz G. and Zubair M. (2006). Relationship of body weight with linear body measurements in goats. J. Agric. Biol. Sci. 3, 51-54.
Janssens S. and Vandepitte W. (2004). Genetic parameters for body measurements and linear type traits in Belgian Blue du Maine, Suffolk and Texel sheep. Small Rumin. Res. 54, 13-24.
Mavrogenis A.P., Louca A. and Robison O.W. (1980). Estimates of genetic parameters for pre-weaning and post-weaning growth traits of Chios lambs. Anim. Prod. 30, 271-276.
Meyer K. (2000). DFREML Programs to Estimate Variance Components for Individual Animal Models by Restricted Maximum Likelihood (REML). Users Notes, Animal Genetics and Breeding Unit, Armidle, Australia.
Miraei-Ashtiani S.R., Seyedalian A.R. and Moradi shahrbabak M. (2007). Variance components and heritabilities for body weight traits in Sangsari sheep, using Univariate and multivariate animal models. Small Rumin. Res. 73, 109-114.
Mohammadi Y., Rashidi A., Mokhtari M.S. and Beigi Nassiri M.T. (2011). The estimation of (co)variance components for growth traits and Kleiber ratios in Zandi sheep. Small Rumin. Res. 99, 116-121.
Mukherjee D.K., Singh C.S.P., Mishra H.R. and Nath N. (1986). Body weight measurement relationships in brown Bengal does. Indian J. Vet. Med. 10, 1004-1006.
Ravimurugan T., Thiruvenkadan A.K., Sudhakar K., Panneerselvam S. and Elango A. (2013). The estimation of body weight from body measurements in Kilakarsal sheep of Tamil Nadu, India. Iranian J. Appl. Anim. Sci. 3, 357-360.
Safari E. (1986). Report for Identification of Makuie Ecotype. Published by Agriculture Ministry of Iran, Tehran, Iran.
Sahin M., Cankaya S. and Ceyhan A. (2011.) Canonical correlation analysis for estimation of relationships between some traits measured at weaning time and six-month age in Merino lambs. Bulgarian J. Agric. Sci. 17, 680-686.
Salako A.E. (2006). Application of morphological indices in the Assessment of type and function in sheep. Int. J. Morphol. 24, 13-18.
SAS Institute. (2011). SAS®/STAT Software, Release 9.1. SAS Institute, Inc., Cary, NC. USA.
Singh N.R., Mohanty S.C. and Mishra M. (1987). Prediction of body weight from body measurements in black Bengal goats: a note. Indian J. Anim. Prod. Manage. 3, 46-49.
Snyman M.A., Erasmus G.J., Van-Wyk J.B. and Olivier J.J. (1995). Direct and maternal (co)variance components and heritability estimates for body weight at different ages and fleece traits in Afrino sheep. Livest. Prod. Sci. 44, 229-235.
Supakorn C., Pralomkarn W. and Anothaisinthawee S. (2012). Estimation of genetic parameters and genetic trends for weight and body measurements at birth in sheep populations in Thailand. Songklanakarin J. Sci. Thechnol. 35, 1-10.
Yazdi M.H., Engström G., Nasholm A., Johansson K., Jorjani H. and Liljedahl L.E. (1997). Genetic parameters for lamb weight at different ages and wool production in Baluchi sheep. Anim. Sci. J. 65, 224-255.
