Comparison of PCA and DAPC methods for analysis of Iranian Buffalo population structure using SNPchip90k data
Zahra
Azizi
Former Ph.D. Student, Department of Animal Sciences, Faculty of Agricultural Sciences, University of Tabriz, Iran
author
Hossein
Moradi Shahrbabak
Assistant Professor, Department of Animal Sciences, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
Mohammad
Moradi Shahrbabak
Professor, Department of Animal Sciences, University College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
text
article
2017
per
Understanding of population genetic structure is valuable for better implementation of breeding programs and most importantly, preservation of genetic resources. Genomic data provide an opportunity to consider complex evolutionary history of populations and reconstruct rare historical events. In this research, the structure of Iranian buffalo populations was studied by using principal component analysis and discriminant analysis principal component methods. For this purpose, the number of 404 buffalos from three breeds including North, Azari and Khozestani were sampled and genotyped by SNPChip 90k from Padano Company in Italy. The results of principal component analysis and discriminant analysis principal component showed a clear picture of the genetic structure of the studied populations. Assessing the optimal number of clusters with criteria BIC, K = 3 by the DAPC method showed the best results. The result of cross-validation for retaining principal components was optimized to 50 first components that showed the lowest MSE. In this study, DAPC predicted assignment of individuals to clusters and membership probabilities with 100% accuracy. PCA method was not able to provide a group assessment and DAPC method outperformed than PCA in achieving a clear variance difference between populations. DAPC method can be applied in quality control and stratification population correction of GWAS as an alternative to the PCA because of summarizing the genetic differentiation between groups and overlooking within-group variation and providing better population structure.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
153
161
https://ijas.ut.ac.ir/article_63029_c1b19aa61aa42b063b4fe5c51a84d643.pdf
dx.doi.org/10.22059/ijas.2017.213547.653461
Estimating accuracy of genomic breeding values for complex traits in populations without pedigree using dense markers
Elham
Elahinejad
M.Sc. Student, Department of Animal Science, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran
author
Hossein
Mehrban
Assistant Professor, Department of Animal Science, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran
author
Mostafa
Shakhsi-Niaei
Assistant Professor, Department of Genetics, Faculty of Science, Shahrekord University, Shahrekord, Iran
author
text
article
2017
per
The aim of this study was to estimate the accuracy of genomic breeding values using GBLUP (Genomic Best Linear Unbiased Prediction) model and compare it with the traditional method with (BLUP) and without (BLUP_noPed) pedigree by computer simulation. In this study, a genome with 30 pairs of chromosomes, 3000 QTL and 45000 marker (SNP) was simulated. The different scenarios including two effective population of 100 and 1000 animals, two reference population size of 1000 and 2000 animals and three heritabilities, low (0.05), medium (0.30) and high (0.5) were investigated. The criteria were accuracy, bias and mean square error (MSE) of breeding value to compare traditional and genomic methods. The results showed that the accuracy of breeding values increased with increasing heritability. GBLUP mehtod was more accurate than BLUP_noPed in all scenarios and the former model had more performance in higher heritability compared with BLUP model. The accuracy of genomic breeding values decreased about 11% with increasing effective population size 100 to 1000; however, the accuracy of traditional methods was not affected by changing effective population size. Increasing the reference population size 1000 to 2000, the accuracy of genomic breeding values was improved by 5%. Although, the bias (underestimate) was higher for genomic than traditional methods in all scenario; but the MSE of breeding values was lower for GBLUP than BLUP model with increasing reference population size and heritability. Therefore, GBLUP method can be used to select top animals in populations without pedigree.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
163
174
https://ijas.ut.ac.ir/article_63030_92d76ba5fca8f36900b455263f38a1f6.pdf
dx.doi.org/10.22059/ijas.2017.228764.653517
The effect of dietary Letrozole on plasma gonadotropin concentrations and some testicular histology parameters in 40 weeks old broiler breeder rooster
Emad
Abdulgabbar Ali
Ph. D. Candidate, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
Mahdi
Zhandi
Associate Professor, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
Armin
Towhidi
Professor, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
Mojtaba
Zaghari
Professor, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
Mahdi
Ansari
Ph. D. Candidate, Department of Animal Science, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran
author
text
article
2017
per
The current study was carried out to evaluate the effect of Letrozole feeding on plasma LH and FSH concentrations and testicular histology in Ross 308 broiler breeder roosters. Twenty 40-week old roosters were randomly divided into four groups, individually housed and fed different levels of capsulated Letrozole including 0 (L0), 0.5 (L0.5), 1 (L1) or 1.5 (L1.5) mg/bird/day for 12 consecutive weeks. Blood sampling was done on 1th, 3th, 5th, 7th and 9th weeks of trail. Testicular histology was assessed on samples from last week (12th) of experiment. According to the results, plasma LH and FSH levels, seminiferous tubule diameter and epithelium thickness as well as Leydig cell numbers were significantly increased in Letrozole treated groups compered to control group. The highest concentration of FSH and LH were recorded for L1 (10.39 ±0.11 and 2.93±0.08) and L1.5 (9.5±0.2 and 3.17±0.08) groups, respectively. Both L0.5 and L1 groups had significantly higher spermatogonial numbers than control group. However, blood vessel numbers were not significantly affected. In conclusion, orally feeding Letrozole (1 and 1.5 mg) could improve gonadotropin concentration and testicular histology parameters of male broiler breeders at 40 weeks of age. Further studied are needed to confirm these results and extend them to final fertility.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
175
183
https://ijas.ut.ac.ir/article_63031_ba9e6266c72f96733d87c29470859ad6.pdf
dx.doi.org/10.22059/ijas.2017.231769.653523
Phylogenetic and evolutionary analysis of nucleotide sequence of FASN gene
Hagar
Rezakhani
Former M.Sc. Student, Department of Animal Science, University of Zabol, Iran
author
Gholam Reza
Dashab
Assistant Professor, Department of Animal Science, University of Zabol, Iran
author
Mehdi
Vafaye Valleh
Assistant Professor, Department of Animal Science, University of Zabol, Iran
author
text
article
2017
per
In the this research, 38 Holstein dairy cows (18 heads low production and 20 heads high-production) were selected randomly and blood samples were taken their from tail vein. DNA was extracted from whole blood with phenol-chloroform. PCR amplification of 750bp from 37 to 39 exons of FASN gene was performed using one pairs of special primers. Sequencing of the amplified region was performed by the Sanger method. Sequence data of other species was achieved and aligned by searching its genome database (NCBI). The nucleotide substitution rate of the sequences and molecular evolution of the FASN were calculated by maximum likelihood and neighbor-joining method, respectively and phylogenetic tree was constructed. Evolutionary and phylogenetic tree analysis was performed using MEGA6 and Dnasp5.1 software's. Bioinformatics analysis results showed that the substitution percentage of purines was more than pyrimidine nucleotides. The numerical value of dN/dS in two groups of dairy cow and in comparison with that of other species were 1.16 and 1.12, respectively which indicating positive selection during evolution of this gene. Phylogenetic tree for the FASN gene in mammals shows close relationship between Buffalo and Bison, as well as Cats and Cheetahs (%98 and %57, respectively).The results show that over the years segregation and selection of new varieties, resulted in the development of new varieties, new proteins and also stabilizes their performance during the evolution and advance progress toward their performance has been purified.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
185
196
https://ijas.ut.ac.ir/article_63032_641247d878e852ecab0e591c27f22c08.pdf
dx.doi.org/10.22059/ijas.2017.229395.653519
Effect of scaling genomic relationship matrix on estimation of variance components and accuracy of breeding values
Sayed Mahdi
Hosseini Vardanjani
Ph.D. Student, Animal Breeding and Genetics, Department of Animal Science, University of Mashhad, Iran
author
Mohammad Mahdi
Shariati
Assistant Professor, Animal Breeding and Genetics, Department of Animal Science, University of Mashhad, Iran
author
Hossein
Naeeimipour Yuonesi
Ph.D. Student, Animal Breeding and Genetics, Department of Animal Science, University of Mashhad, Iran
author
text
article
2017
per
In this study, Bayesian approach via Gibbs sampling was used to predict unknown parameters of five equivalent Genomic Best Linear Unbiased Predictions (G-BLUP), each with different scale of G matrix by using allele frequency of founder population (Gfoun), allele frequency of reference population (Gref), allele frequency equal to 0.5 (G05), a normalized matrix with average diagonal coefficients equal to 1 (Gnorm) and a weighted G matrix with A matrix (Gwei). A random mating population and a selected population were used to compare results of a trait with heritability of 0.25 on a genome constructed of three chromosomes with 105 QTLs and 3000 single nucleotide polymorphisms. The results showed that higher variance existed in the elements of G matrices compared with A matrix. Average diagonal and off-diagonal elements except Gnorm and Gwei were higher than corresponding elements in A. Gnorm-BLUP and G05-BLUP methods led to inflated genetic variance in contrast other three methods and this inflation was lower in selected population. Average accuracy over 5 G-BLUP in random population was 0.084 higher than selected population (0.762 vs. 0.652) and bias was 0.041 lower (0.026 vs. 0.04). Bias of prediction of true breeding value of selected population by using Gwei almost was zero but with Gref greater than 0.06. The greatest accuracy and the smallest bias can be obtained by using allele frequency of reference population that re-scaled with A matrix.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
197
206
https://ijas.ut.ac.ir/article_63033_90977f52363eac4c177a89891db2c231.pdf
dx.doi.org/10.22059/ijas.2017.206779.653445
Effect of in ovo injection of different ratios of L-arginine to L-lysine on body growth, muscle production, and blood metabolites concentration of day old Ross broiler chicks
Farideh
Abdolalizadeh Alvanegh
M.Sc. Student, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Iran
author
Marziyeh
Ebrahimi
Assistant Professor, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Iran
author
Hossein
Daghigh Kia
Professor, Department of Animal Science, Faculty of Agriculture, University of Tabriz, Iran
author
text
article
2017
per
The aim of this research was to evaluate the effect of in ovo injection of different ratios of L- arginine to L- lysine on body growth, muscle production and blood metabolites concentration of day old Ross broilers chicks. A total of 210 fertile Ross 308 broiler breeder eggs were used in a completely randomized design with seven experimental groups of 30 individual eggs in each treatment. The experimental treatments included: sham-control (sterile distilled water injected), control (non-injected), and injection of solutions with 75.7, 80.7, 85.7, 90.7 and 95.7 percent L-arginine to L-lysine ratios. On hatching, the chicks were weighed and their blood samples were collected. Then, chicks were euthanized and their carcass traits were weighed. According to the results of this study, the maximum hatchability percentage was observed in 90.7 percent of L- arginine to L- lysine ratio. The results also showed that the in ovo injection of different L- arginine to L- lysine ratio up to 90.7 percent resulted in significant increase in chick weight (P< 0.01), relative weight of scalped carcass (P< 0.01), carcass efficiency (P<0.01), thigh relative weight (P< 0.05), breast muscle relative weight (P< 0.01) and relative weight of liver (P< 0.05), whereas blood plasma urea concentration was significantly (P< 0.05) decreased. In overall, results indicated that in ovo injection of 90.7% L-arginine to L-lysine ratio is an advisable ratio for improving muscle growth, blood serum metabolite concentrations, and hatchability percentage of broilers.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
207
217
https://ijas.ut.ac.ir/article_63034_2584133bcd9f6218c432aa441963a081.pdf
dx.doi.org/10.22059/ijas.2017.221665.653484
Effect of oak acorn and dietary methionine level on performance, some organs weight and tibia characteristics in broiler chicken
Fatemeh
Nedaei
M. Sc. Student, Department of Animal Science, Faculty of Agriculture, Yasouj University, Iran
author
Mohammad
Houshmand
Assistant Professor, Department of Animal Science, Faculty of Agriculture, Yasouj University, Iran
author
Siamak
Parsaei
Assistant Professor, Department of Animal Science, Faculty of Agriculture, Yasouj University, Iran
author
Mehrdad
Meamar
Assistant Professor, Department of Animal Science, Faculty of Agriculture, Yasouj University, Iran
author
text
article
2017
per
The effects of replacing 0, 15 and 20 of corn by percent oak acorn (OA), in diets contacting recommended and twice recommended level of methionine by NRC (1994) on performance of broilers were investigated. 528 one-day-old Cobb 500 broiler chicks in a 2×3 factorial arrangement based on completely randomized design with four replicates of 22 chicks were used. Chicks fed with diets containing 15 and 20 percent OA had lower body weight gain and higher feed conversion ratio compared to those fed with diet without OA, in all experimental periods (P<0.05). The increasing dietary methionine level as Twice as NRC (1994) recommendation reduced feed intake and body weight gain in finisher and overall experimental periods significantly (P<0.05). No significant interaction was observed between dietary OA utilization and methionine for performance parameters. The 20 percent dietary OA utilization had undesirable effect on some tibia characteristics (P<0.05). Generally, the substitution of 15 and 20 percent of dietary corn with OA resulted in reduction in broilers performance and increasing the dietary level of methionine could not prevent this situation.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
219
228
https://ijas.ut.ac.ir/article_63035_198c1e443fc0f50ec37e7986a238e06e.pdf
dx.doi.org/10.22059/ijas.2017.227014.653504
Effects of dietary cereal source and enzyme supplementation on performance and serum traits in broiler chicks
Ebrahim
Gharaghani
Former M. Sc. Student, University of Kurdistan, Sanandaj, 66177-15175, Kurdistan, Iran
author
Ahmad
Karimi
Associate Professor, University of Kurdistan, Sanandaj, 66177-15175, Kurdistan, Iran
author
Ghorban ali
Sadeghi
Professor, University of Kurdistan, Sanandaj, 66177-15175, Kurdistan, Iran
author
text
article
2017
per
A total of 392 one-day male broiler chicks (Ross 308) were used to evaluate the effect of grain source (corn or Sardari, Zarrin and Azar-2 wheat cultivars) with or without a carbohydrase mixture enzyme an chicks performance from day 1 to day 49. A completely randomized design (seven treatments, four replicates and 14 chicks per replicate) was used. Results showed that birds fed diet contained Zarrin vs. Sardari or Azar-2 had higher body weightat 11, 25 and 42 days of ages. Birds fed Zarrin vs. Azar-2 diet had higher feed intake from 1 to 11 d. Bird’s fed diet with Sardari treatment showed lower serum glucose and total protein at 20d, lower carcass and pancreas relative weight (%) at 21 and 41d, respectively. Enzyme supplementation significantly improved bird’s body weight at 11, 25 and 42 d. Enzyme improved feed conversion ratio from 12 to 25 and 43 to 49 days of age. In addition, birds fed enzyme contained diet had significantly lower gizzard and pancreas relative weight (%) at 21d. In conclusion, the findings show that birds fed diet containing Zarrin cultivar or supplemented with enzyme mixture had higher performance.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
229
241
https://ijas.ut.ac.ir/article_63372_fc13de89266148ed79d79e873742475d.pdf
dx.doi.org/10.22059/ijas.2017.231174.653522
Effect of feeding a high concentrate diet on fattening performance, rumen fermentation, chewing activity and some of metabolic parameters in Afshari and Lori male lambs
Azam
Mohammadi-Mehr
Former M.Sc. Students, Department of Animal Science, College of Agriculture, Isfahan University of Technology, Iran
author
Ebrahim
Ghasemi
Assistant Professor, Department of Animal Science, College of Agriculture, Isfahan University of Technology, Iran
author
Masood
Alikhani
Associate Professor, Department of Animal Science, College of Agriculture, Isfahan University of Technology, Iran
author
text
article
2017
per
This research was conducted to evaluate feedlot performance, carcass characteristics, nutrient digestibility, blood metabolites, chewing activity, and economic return of Afshari and Lori lambs feeding a high concentrate diet. Eight Afshari lambs and 8 Lori lambs (28.4±3.8 kg initial weight, 3-4 months of age) were assigned into a completely randomized design for 104 days and fed a diet consisting of (DM basis) 80% concentrate mixture and 20% forage. Results indicated that feed intake (P=0.01), final body weight (P=0.03) and average daily gain (P=0.03) were greater in Afshari than Lori lambs. However, feed conversion ratio and nutrient digestibility were not different between two groups (P<0.05). Despite higher feed cost in Afshari lambs, income over feed cost were greater for Afshari than for Lori lambs (P<0.05). Weight percentage of fresh carcass dressing, concentrations of blood metabolites, total short chain and individual fatty acids were similar between two groups. Compared to Afshari lambs, Lori lambs showed greater total chewing activity per g of DMI as well as ruminal pH (P<0.05). Despite similar feed efficiency between two breeds, feeding high concentrate diet is recommended to Afshari lambs because of better fattening performance and economic return.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
243
250
https://ijas.ut.ac.ir/article_63373_88a0a40f29d786cc82c52b1cd7ac875d.pdf
dx.doi.org/10.22059/ijas.2017.234128.653529
Effect of different levels of dietary vitamin A on reproductive and productive parameters in Japanese quail
Masoumeh
Davodzadeh
M.Sc. Student, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran
author
Saleh
Tabatabaei Vakili
Associate Professor, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran
author
Khalil
Mirzadeh
Associate Professor, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran
author
Ali
Aghaei
Instructor, Ramin Agriculture and Natural Resources University of Khuzestan, Mollasani, Ahvaz, Iran
author
text
article
2017
per
The purpose of this research was to evaluate the effect of five levels of vitamin A including 0, 4,000, 8,000, 16,000 and 32,000 international units per kilogram of diet on productive and reproductive parameters in Japanese quail. 320 adult Japanese quails were used in a complete randomized block design with 5 treatments, 4 replicates and 16 quails (12 female and 4 male) in each replicate for 42 days. Percentage of egg production and egg weight were recorded weekly and their mean were calculated for total period of experiment. After two weeks of experiment, food intake weight was measured to determine the daily food intake amount and food conversion ratio and was extended for total period. At the end of experiment, 5 eggs of each replicate were randomly selected for evaluate egg quality parameters, and also, 40 eggs from each replicate were incubated for evaluation the reproductive parameters. The different levels of vitamin A in diet had no significant effect on food intake, egg production rate, weight and quality parameters of eggs (P > 0.05). Fertility, hatchability, and embryonic mortality rates as well as hatched chick weight were not affected by different levels of dietary vitamin A (P>0.05). The lowest food conversion ratio was observed in 32000 IU/kg of vitamin A (P<0.05).
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
251
259
https://ijas.ut.ac.ir/article_63374_d4348ca23afacb089aa978d77eb8733e.pdf
dx.doi.org/10.22059/ijas.2017.235166.653534
Lipids digestibility, blood serum concentrations of fat constituents and steroid hormones, carcass fat deposition and distribution pattern in broiler chickens fed carvacrol, menthol and thymol supplemented diets
Mirhassan
Beiranvand
Former Ph. D. Student, Faculty of Agriculture, Lorestan University, Khoramabad, 68137-17133, P.B. 465, Lorestan, Iran
author
Heshmatollah
Khosravinia
Professor, Faculty of Agriculture, Lorestan University, Khoramabad, 68137-17133, P.B. 465, Lorestan, Iran
author
Arash
Azarfar
Associate Professor, Faculty of Agriculture, Lorestan University, Khoramabad,
68137-17133, P.B. 465, Lorestan, Iran
author
Ezatolla
Rafiei Alavai
Assistant Professor, Department of Pathology, Faculty of Medicine, Lorestan University of Medical Sciences, Khorramabad, 68138-33946, Iran
author
text
article
2017
per
This research was conducted to examine the effect of addition 400, 200 and 200 mg/kg carvacrol, menthol and thymol, respectively, to a non- supplemented control diet on carcass fat deposition and distribution pattern in broilers. 96 female Ross 308 broiler chicks were used in 4 treatments and 12 replicates of two birds in each from 14 to 42 days of age. Ileal fat digestibility was decreased by 8.02, 5.06 and 15.08 percent in the birds receiving carvacrol-, menthol- and thymol-supplemented diets, respectively (P<0.01). The meanof carcass fat and feather fat percentage was reduced in the birds fed diets containing carvacrol by 6.08 and 31.57 percent, respectively, in comparison to control (P<0.05). The addition of carvacrol to diet resulted in 6.86 (P>0.05), 6.95 (P>0.05), 38.01 and 10.50 (P<0.05) percent reduction in abdominal, neck, subcutaneous and thigh intramuscular fat deposits, respectively. The back fat thickness of chicks receiving diets containing carvacrol, thymol and menthol was significantly (P<0.05) lower than that of control group. The blood serum concentration and ratio of estradiol, dehydroepiandrosterone, testosterone, cortisol and progesterone of chicks fed diets containing carvacrol, thymol and menthol had no significant difference with control (P>0.05). According to the results of this study, it seems that carvacrol and thymol will result to reduction in ileal fat digestibility and carcass fat of broilers especially in subcutaneous fat.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
261
272
https://ijas.ut.ac.ir/article_63375_1e8453ca585c158a1fcee038a4c9eec7.pdf
dx.doi.org/10.22059/ijas.2017.217434.653474
Effect of in-ovo feeding of beta-hydroxy beta-methylbutyrate and dextrin and posthatching water and feed deprivation on body glycogen resources and jejunal morphology of broilers at 7 days of age using response surface methodology
Moein
Ghanaatparast-Rashti
Ph.D. Student and, Department of Animal Science, Faculty of Agriculture Science, University of Guilan, PO Box 41635-1314, Tehran, Iran
author
Majid
Mottaghitalab
Associatet Professor, Department of Animal Science, Faculty of Agriculture Science, University of Guilan, PO Box 41635-1314, Tehran, Iran
author
Hamed
Ahmadi
Assistant Professor, Department of Poultry Science, Faculty of Agriculture Science, Tarbiat Modares University, PO Box 14115-336, Tehran, Iran
author
text
article
2017
per
This research was conducted to evaluate broiler response to in-ovo feeding of beta-hydroxy beta-methylbutyrate (HMB) and dextrin and the timing of the first feed deprivation using Box-Behnken design and response surface methodology. On day 18 of incubation, 1500 fertile eggs from Ross 308 strain were randomly assigned to experimental treatments of Box-Behnken design, each with 4 replicates, as 3 levels in-ovo injection of HMB (0, 0.5 and 1 %) and dextrin (0, 20 and 40 %), and 3 levels of the first water and feed restriction time (6, 27 and 48 hours). The in-ovo injection of dextrin led to significant lower hatchability (P<0.05), whereas in-ovo injection of HMB had no significant effect on hatchability (P>0.05). In European efficiency factor models, the jejunal villi surface area and glycogen contents of liver and breast muscle at 7 days of age, the linear components showed highest contribution (0.61 to 0.79) of variation in chick responses. The results of this research showed that maximum European efficiency factor at 7 days of age can be achieved by in-ovo administration of HMB and dextrin (0.54 and 39.03 percent, respectively) in amnion fluid till maximum 20.79 hours feed deprivation after hatch.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
273
286
https://ijas.ut.ac.ir/article_63376_09a636dbaa344ccd263ff65307c21470.pdf
dx.doi.org/10.22059/ijas.2017.236208.653539
Effect of Butylated Hydroxy Anisole (BHA) and Butylated Hydroxy Toluene (BHT) on semen quality of Ram semen after freeze thawing Process
Ahmad
Akbari Kalesar
Former M. Sc. Student in Animal Physiology, Islamic Azad University, Karaj Branch, Iran
author
Afshin
Seifi-Jamadi
Ph.D. Candidate in Animal Physiology, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
author
Jafar
Yadi
Assistant Professor, Department of Veterinary, Saveh Branch, Islamic Azad University, Saveh, Iran
author
Hamid
Kohram
Assistant Professor, University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran
author
text
article
2017
per
The aim of this study was to evaluate the effects of different concentration of Butylated hydroxy toluene (BHT) and Butylated hydroxyanisole (BHA) on freezing capacity of Rams semen. Semen of four healthy mature ram (2.5 - 4 years) was collected, twice a week for three weeks. Collected semen samples were pooled after primary evaluation and divided into 8 groups. Then samples were diluted with one of the treatments [ including negative control (without antioxidants and DMSO), positive control (without antioxidants, with DMSO), BHA-0.5 (containing 0.5 mM BHA), BHA-1 (containing 1 mM BHA), BHA-2 (containing 2 mM BHA), BHT-0.5 (containing 0.5 mM BHT), BHT-1 (containing 1 mM BHT) and BHT-2 (containing 2 mM BHT)] and were equilibrated at 4 ºC for 150 min. Afterward the cooled semen were loaded into 0.25 mL straws and were frozen in liquidnitrogen vapor. Motion characteristic (using CASA: Computer Assisted Sperm Analysis), viability and membrane integrity were assessed after thawing. The results of this study showed that addition of 2mM BHA to the extender could significantly increase total motility compared to the negative and positive control treatments (P>0.01).Also addition of 2 mM BHA significantly improved the progressive motility and membrane integrity compared to rest of the groups (P>0.05). However, different levels of BHA and BHT have not shown any significant difference in viability of ram sperm (P>0.05). So it is concluded that the addition of 2 mM BHA to the extender could improves the freezability of Ram semen.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
287
295
https://ijas.ut.ac.ir/article_63378_04ebbaaf992dd1bc856c02b94523a05e.pdf
dx.doi.org/10.22059/ijas.2017.235753.653538
Estimating genetic parameters of kid survival in Raini Cashmere goat using linear and Weibul models
Fatemeh
Mohammadinejad
M.Sc. Student, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
author
Mohammadreza
Mohammadabadi
Professor, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
author
Arsalan
Barazandeh
Assistant Professor, University of Jiroft, Jiroft, Iran
author
text
article
2017
per
In this study, the records of survival of 3056 kids related to the breeding station of Raini Cashmere goat were used during years 1993-2004. These records were collected in Raein Breeding station located in the Baft city, Kerman province, Iran. The data were analyzed using linear and hazard ratio models with Weibul function. These models included fixed factors such as year and month of birth, sex, type, age of dam and birth weight as quadratic covariate, and direct additive genetic, maternal additive genetic, maternal permanent environmental and residual random effects. Genetic parameters were estimated using restricted maximum likelihood procedure and different animal models contained with and without maternal and common environmental effects and sire model. The direct heritability of length of life and survival rate estimated from different linear models was low (0.01 to 0.06). The estimates of heritability in logarithmic scale, original scale and effective heritability obtained from sire and animal models with Weibull function were medium to high (0.17 to 0.70) and higher than analogous values estimated by different linear models. Medium estimates show that genetic and non-genetic factors affect survival. Hence, to improve these traits, selecting beside suitable management are necessary.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
297
304
https://ijas.ut.ac.ir/article_63380_ae3f2c64e2cf361f09d63f04e9c7750a.pdf
dx.doi.org/10.22059/ijas.2017.237238.653542
Relationship between body condition and milk test with mastitis prevalence of dairy cows at early lactation
Morteza
Mansooryar
Ph.D. Student, Department of Animal Science, University of Zanjan, Iran
author
Hamidreza
Mirzaei Alamouti
Associate Professor, Department of Animal Science, University of Zanjan, Iran
author
Mehdi
Dehghan-Banadaky
Associate Professor, Department of Animal Science, University College of Agriculture & Natrual Resources, University of Tehran, Karaj, Iran
author
text
article
2017
per
This study was conducted to evaluate the relationship between calving body condition score (BCS) as well as first and second milk test postpartum with clinical and subclinical mastitis prevalence. After calving 117 multiparous cows were divided to two groups based on their BCS as fat and normal conditioned and milk samples were taken in week one and two postpartum. The results showed BCS at calving time had no significant relationships with udder health. Milk protein and fat had significant associations with udder health in week 1 and 2 postpartum; however in none of weeks no meaningful relationships were found between milk fat to protein ratio with udder inflammation. Therefore, calving BCS and fat to protein ratio are not reliable markers for clinical or subclinical mastitis incidence; however milk fat and protein in week 1 and 2 postpartum can be used as proper markers for predicting subclinical mastitis in dairy cows at early lactation.
Iranian Journal of animal Science
پردیس کشاورزی و منابع طبیعی دانشگاه تهران
2008-4773
48
v.
2
no.
2017
305
312
https://ijas.ut.ac.ir/article_63382_0e728a4a54e5aab5841ff5ce80bca48f.pdf
dx.doi.org/10.22059/ijas.2017.233659.653527