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Jafaroghli, M., Rashidi, A., Mokhtari, M. S., Mirzamohammadi, E.. (1392). Estimation of genetic parameters for body weight traits in Baluchi sheep. , 1(2), 28-33. doi: 10.22103/jlst.2013.552
M. Jafaroghli; A. Rashidi; M. S. Mokhtari; E. Mirzamohammadi. "Estimation of genetic parameters for body weight traits in Baluchi sheep". , 1, 2, 1392, 28-33. doi: 10.22103/jlst.2013.552
Jafaroghli, M., Rashidi, A., Mokhtari, M. S., Mirzamohammadi, E.. (1392). 'Estimation of genetic parameters for body weight traits in Baluchi sheep', , 1(2), pp. 28-33. doi: 10.22103/jlst.2013.552
Jafaroghli, M., Rashidi, A., Mokhtari, M. S., Mirzamohammadi, E.. Estimation of genetic parameters for body weight traits in Baluchi sheep. , 1392; 1(2): 28-33. doi: 10.22103/jlst.2013.552

Estimation of genetic parameters for body weight traits in Baluchi sheep

Journal of Livestock Science and Technologies
مقاله 4، دوره 1، شماره 2، دی 2013، صفحه 28-33    اصل مقاله (544.42 K)
نوع مقاله: Research Article (Regular Paper)
شناسه دیجیتال (DOI): 10.22103/jlst.2013.552
نویسندگان
M. Jafaroghli1؛ A. Rashidi* 2؛ M. S. Mokhtari3؛ E. Mirzamohammadi2
1Department of Agriculture, Payame Noor University, Tehran, Iran
2Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
3Department of Animal Science, Faculty of Agriculture, University of Jiroft, Jiroft, Iran
چکیده
Genetic parameters for birth weight (BW), weaning weight (WW), 6 months weight (6MW), 9 months weight (9MW) and yearling weight (YW) in Baluchi sheep were estimated using data collected during a 26-year period (1984-2010). Estimates of (co)variance components were obtained by REML procedures by fitting a linear mixed animal model. Significant random effects for each trait were explored by fitting direct additive genetic effects, maternal additive genetic effects, covariance between direct additive and maternal additive genetic effects, maternal permanent environmental effects and common litter effects in different models. The Akaike's information criterion (AIC) test was applied to determine the most appropriate model for each trait. The estimated direct heritabilities for BW, WW, 6MW, 9MW and YW were 0.34, 0.09, 0.06, 0.12 and 0.16, respectively. Corresponding maternal heritability estimates were 0.12, 0.07, 0.05, 0.03 and 0.01, respectively. The variance ratios due to maternal permanent environment (c2) decreased from 0.06 in BW to 0.02 for YW. The variance ratios due to litter component were 0.23, 0.07, 0.08 and 0.12 for BW, WW, 9MW and YW, respectively. Direct genetic correlations between body weight traits were positive and high and ranged from 0.52 for BW-YW to 0.96 for 9MW-YW.
کلیدواژه‌ها
heritability؛ Growth traits؛ genetic correlation؛ sheep
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