mohammadreza bakhtiarizade; mohammad moradi shahre babak; hossein moradi; mahmood vatankhah
Abstract
The relationship between live body weight, body length, girth circumference, animal hight, upper, middle as well as lower width of fat-tail, fat-tail length, fat-tail gap length, fat-tail depth and fat-tail circumference along with fat-tail weight were determined using records of 731 Loribakhtiari sheep. ...
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The relationship between live body weight, body length, girth circumference, animal hight, upper, middle as well as lower width of fat-tail, fat-tail length, fat-tail gap length, fat-tail depth and fat-tail circumference along with fat-tail weight were determined using records of 731 Loribakhtiari sheep. Principal Component and Least Square Analyses were applied to solve the collinearity instability. Collinearity problems as portrayed by variance inflation factors above 5 or 10 were evident in some of independent variables. Results showed that the problem of collinearity in relation with fat-tail weight of 11 independent variables could be solved by using Principal Component Analysis method. Fat-tail gap length, fat-tail depth, and fat-tail circumference vs. girth circumference, and fat-tail length respectively represented the highest and the lowest coefficients regarding the estimation of fat-tail weight.
zakaria ghadiri; mohammad moradi; hossein moradi; ghodratollah rahimi
Abstract
Data on 300 Kermani sheep from Kermani Breeding Center of Shahrbabak were utilized in the present research. Horizontal polyacryle amide electrophoresis was employed to detect polymorphism of Transferrin and Albumin, while Acetate cellulose being utilized for Hemoglobin. Three genotypes of Hemoglobin ...
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Data on 300 Kermani sheep from Kermani Breeding Center of Shahrbabak were utilized in the present research. Horizontal polyacryle amide electrophoresis was employed to detect polymorphism of Transferrin and Albumin, while Acetate cellulose being utilized for Hemoglobin. Three genotypes of Hemoglobin were observed(AA, AB and BB with respective frequencies of 4.6, 43.8 and 51.6). Frequency of A allele of Hemoglobin in Kermani sheep was superior to those investigated in other Iranian sheep. Eight allels were determined for tranferrin, (B, C, A, D, E, G, Q and L in frequencies of 46.7, 27.11, 12.82, 9.16, 2.01, 1.28, 0.55 and 0.37 respectively). These alleles made up 19 genotypes from among which BC genotype possessed the most frequency while AL & LD genotypes the least ones. Albumin Electrophoresis results showed two genotypes SS and SW with frequency of 98% and 2% respectively. Following genotype determination of the sheep for the proteins, effect of proteins on body weight, daily weight gain and wool production was investigated. Trensferrin and Hemoglobin effects were singnificant on 12 month weight (P
amirhossein khaltabadi; hossein moradi; hossein mohammadi
Abstract
To determine the protein polymorphism of ovine transferrin association with carcass economic traits in Makoei, blood samples of 576 (male and female) lambs with two types of Venoject (EDTA anticoagulant containing and non-anticoagulant containing). plasma and serum were then separated and kept in the ...
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To determine the protein polymorphism of ovine transferrin association with carcass economic traits in Makoei, blood samples of 576 (male and female) lambs with two types of Venoject (EDTA anticoagulant containing and non-anticoagulant containing). plasma and serum were then separated and kept in the Central Laboratory of Animal Science Depaartment in Karaj at -20°C. The research was conducted in Maysam Slaughter House located in Robat Karim. Transferrin polymorphism was determined through horizontal electrophoresis gel polyacrylamid. In total 24 genotypes with 10 respective alleles of C, B, D, A, E, G, L, K, M, Q, frequency were determined. The C allele with 0.29 frequency was the frequent allele and the M one with the 0.004 frequency was the rare allele. Association of polymorphic variations of ovine transferrin with live weight, hot carcass weight, hot carcass weight with and fat-tail weight was significant (P0.05).
s. foroutanifar; h. mehrbani yeganeh; Hossein Moradi Shahrbabak
Abstract
The aim followed in this study was to use the multi and single trait analyses for a prediction of genomic and traditional breeding values and to make a comparison of the accuracies of these methods. A base population of 100 animals (50 males and 50 females) was randomly mated for 50 generations to create ...
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The aim followed in this study was to use the multi and single trait analyses for a prediction of genomic and traditional breeding values and to make a comparison of the accuracies of these methods. A base population of 100 animals (50 males and 50 females) was randomly mated for 50 generations to create linkage disequilibrium among loci. The simulated genome size was 10 Morgan, equally divided among 10 chromosomes. On each chromosome, SNP markers were evenly located and QTLs randomly distributed over the genome. Single and multi-trait analyses were employed to BLUP estimate the SNP effects. Genomic breeding values of the animals, for each trait, amounted to the sum of SNP effects for all the loci. Results indicated that the accuracies of genomic breeding values were higher than those of traditional ones. Accuracy of breeding values increased as heritability, map density and the number of individuals, in training population, increased. High genetic correlation between the two traits led to the increased genomic and traditional breeding value accuracies.
s.m. hosseini vardanjani; seidreza miraey; a. pakdel; Hossein Moradi Shahrbabak
Abstract
To investigate the possibility of using ultrasound to estimate carcass composition, 38 Moghani male lambs were made use of. Subcutaneous fat depth (USFT) and longissimus dorsi muscle depth (ULMD) and area (ULMA) were assessed in the site between 12th and 13th ribs by using ultrasound equipped with an ...
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To investigate the possibility of using ultrasound to estimate carcass composition, 38 Moghani male lambs were made use of. Subcutaneous fat depth (USFT) and longissimus dorsi muscle depth (ULMD) and area (ULMA) were assessed in the site between 12th and 13th ribs by using ultrasound equipped with an 8 MHz probe. The lambs were then slaughtered. Carcasses were cold stored at 4°C for 24 hours and then the corresponding measurements performed on the carcasse. The right half of each carcass was dissected to determine carcass composition including muscle, fat and bone. The results revealed that correlation coefficients between the measurements of USFT, ULMD and ULMA and the corresponding carcass recordings were 0.51, 0.71 and 0.92, respectively. Also the correlation coefficients between ULMA and the levels of muscle and bone were recorded as 0.33 and 0.48, respectively. Coefficient of determination in simple regression equation to estimate the hot carcass weight, cold carcass weight, carcass weight without fat-tail and subcutaneous fat depth as based on body weight were 0.85, 0.87, 0.77 and 0.13, respectively. Multiple regression models while using USFT, ULMD, and ULMA in addition to body weight promoted the R2 to 0.86, 0.88, 0.83 and 0.53, respectively. Also the coefficient of determination in simple regression equation to estimate carcass longissimus dorsi muscle area employing only ULMA and carcass longissimus dorsi muscle depth with an employment of only ULMD were recorded 0.86 and 0.50, respectively. The results show that the use of ultrasound to estimate carcass composition on live sheep can be done successfully. Therefore important traits can be asessed and made use of in breeding programs without the need to slaughter killing the animal.
