Search results: 455 results (approx.)

1. The importance of pedigree information and the role of un-genotyped individuals on the neccesity of repeating the genomic selection of binary threshold traits.

Single-step genomic prediction models became the prevailing tool in genetic evaluations of livestock due to high genomic performance, high genotyping costs for some animals, and utilizing both genotyped and un-genotyped animals. The objective of the current study was to investigate the effect of...

Author(s) : Naderi, Y.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.3 pp.fa141-fa152 ref.29

2. Compairing the effect of supplementing a mixed buffer and sodium bicarbonate on growth performance and rumen parameters of Holstein young bulls.

This study aimed to compare the effects of combined buffer and sodium bicarbonate on growth performance and ruminal parameters of Holstein young bulls with an average weight of 330.8±43.1 kg and an age of 240 days, fed with a high-concentrate diet. The experiment was conducted for 90 days with 10...

Author(s) : Ganji, B.; Banadaky, M. D.; Fatehi, F.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.3 pp.fa161-fa169 ref.25

3. Estimation of financial losses associated with abortion in dairy herds using partial budgeting model.

Abortion in dairy cow can be categorized into two types of abortion: Rebreeding (RA, abortion incidence between 60 and 260 d of gestation, without change in lactation number), and new lactation abortion (NLA, abortion incidence after 200 d in gestation which leads to a new lactation). According to...

Author(s) : Keshavarzi, H.; Sadeghi-Sefidmazgi, A.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.52 No.4 pp.fa261-fa270 ref.27

4. Effect of vanillic acid in comparison with vitamin E+C on short- and long-term preservation of ram semen.

In the present study, the effect of vanillic acid in comparison with vitamin E+C on the semen characteristics of Zel's ram under short and long-term preservation, was investigated. The experimental groups consisted of different concentrations of vanillic acid (0, 1, 10 and 100 μg/mL), a mixture of...

Author(s) : Najm-Abadi, Z.; Deldar, H.; Pirsaraei, Z. A.; Dirandeh, E.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.1 pp.23-32 ref.33

5. The effect of natural Algasan pigment on yield and quality of Japanese quail meat.

To investigate the effect of different levels of Algasan pigment on the performance and meat quality of Ja[amease quail, 204 bird at day three of age, were randomly divided into four groups in three replications. Treatments included control diet (without pigment) or with 0.1, 0.2, and 0.3% (A1, A2, ...

Author(s) : Ahmadi, F.; Mousavi, S. M.; Saei, M. M.; Masoori, B.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.2 pp.fa109-fa118 ref.45

6. The study of genotype by environment interaction for milk production traits in Iranian Holstein cattle.

The aim of this study was to investigate the effect of genotype by environment interaction through calculating the rank correlation between estimated breeding values of bulls in Iran and in Interbull. The data of 2,000,378 records of 305 days of milk, fat and protein production in the first, second ...

Author(s) : Afrazandeh, M.; Arpanahi, R. A.; Abbasi, M.; Kashan, N. E. J.; Torshizi, R. V.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.2 pp.fa119-fa126 ref.17

7. Effect of feed form and stock density on performance assessed and some behavioral parameters assessed by image processing, in broiler chickens.

This experiment was conducted to evaluate effect of feed form and stocking density on performance and some behavioral parameters of 208 one-day-old broiler chickens (Ross 308), for 42 days. Treatments were 2 feed forms (pellet versus mash) and 2 levels of density (10 and 16 birds/m2) that was...

Author(s) : Jamalpor, F.; Salari, S.; Mehdizadeh, S. A.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.3 pp.fa141-fa152 ref.40

8. Effect of replacing solvent soybean meal with extruded soybean meal on performance and metabolic status of Holstein fresh cows.

The objective of this study was to compare solvent soybean meal with extruded soybean meal at 135°C on performance and metabolic status of fresh Holstein cows. Twenty-four Holstein cows (BW± SD; 614.45± 28.33) were randomly assigned to 1 of 2 experimental treatments from caving until 21 days in...

Author(s) : Shami, M.; Amanlou, H.; Farahani, T. A.; Farsuni, N. E.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.3 pp.fa153-fa162 ref.33

9. Effects of using polyethylene glycol and sodium bicarbonate to improve the nutritional value of tannin containing diets in broilers.

With the aim of investigation, the effects of oak acorn (OA) (0 or 20% of diet) and tannin-reducing feed additives (without additive, 10 g polyethylene glycol (PEG)/kg of diet and 0.25% diet sodium bicarbonate) on performance and liver and kidney tissues of broiler chickens, a total of 480 Ross 308 ...

Author(s) : Mohammadi, F.; Houshmand, M.; Naghiha, R.; Hosseinifar, S.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.3 pp.fa163-fa175 ref.34

10. Evaluation of dietary effects of soybean lecithin and vitamin E on sperm quality parameters in Hubbard grandparent roosters.

Using 36 Hubbard grandparent roosters at 45 weeks of age, the present study investigated the effects of supplementing vitamin E and soybean lecithin in the roosters' diet on their semen quality. The experiment was conducted in a completely randomized design with four treatments including basal...

Author(s) : Shabani, S.; Mehri, M.; Shirmohammad, F.; Sharafi, M.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.3 pp.fa177-fa188 ref.59

11. Effect of diluted semen temperature and sperm concentration on sperm penetration rate, fertility and hatchability of aged broiler breeder hens.

The current study aimed to optimize artificial insemination in aged broiler breeder hens in two experiments. In the first experiment, the effect of (two) different diluted semen temperatures (5 and 25°C) of Hubbard rooster (40 roosters, 58 weeks of age) on fertility, hatchability and sperm...

Author(s) : Sharideh, H.; Zaghari, M.; Mirbehbahani, S. J.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.2 pp.133-140 ref.27

12. Effect of high dietary zinc, copper and manganese concentration and source on plasma progesterone and reproductive performance in repeat breeder cows.

We used 263 Holstein repeat breeder dairy cows (193±58 DIM) based on randomized complete design. Animals in control group (no supplementation), groups 2 and 3 supplemented with 2,244 mg of zinc, 295.5 mg copper and 480 mg manganese either inorganic trace minerals (ITM) and chelated (glycinates)...

Author(s) : Gholami, V.; Amanlou, H.; Zahmatkesh, D.; Sadeghi, N.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.51 No.4 pp.fa263-fa273 ref.46

13. Effects of activated zinc oxide on serum changes of interleukin 6, tumor necrosis factor alpha and occludance 1 in broiler breeder hens.

The aim of this study was to investigate the effect of physical properties of zinc oxide on serum changes of interleukin 6 (IL-6), tumor necrosis factor alpha (TNFα) and occludance 1 (ZO-1) in broiler breeders. A total of 200 hens (Ross 308), at the age of 54 weeks, was used in a completely...

Author(s) : Arani, E. D.; Zaghari, M.; Barzegar, M.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2021 Vol.52 No.1 pp.fa1-fa10 ref.48

14. Genome-wide association study and pathway analysis for identifying the genes associated with coat color in Lori-Bakhtiari sheep breed.

Coat color is one of the important economic traits in sheep and it can be used for breed identification and characterization as well. The aim of the present study was to perform genome wide association study (GWAS) and pathway analysis based on gene set enrichment analysis for identifying the loci...

Author(s) : Mohammadi, H.; Moradi, M. H.; Farahani, A. H. K.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.3 pp.fa153-fa160 ref.26

15. A comparative study of transcriptome coverage and single nucleotide polymorphisms of mtDNA in Holstein (Bos taurus) vs. Cholistani (Bos indicus).

This research aimed to investigate the reasons for the difference of gene expression between two subspecies of Holstein and Cholistani cattle and the importance of mitochondrial genes of these two breeds, the genes under study were COX1, COX2, COX3, ND1and ND2, which are involved in essential...

Author(s) : Tamroosi, A.; Dashab, G. R.; Banabazi, M. H.; Maghsoudi, A.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.3 pp.fa187-fa201 ref.39

16. Effects of CLA supplementation in diets with different levels of forage NDF on performance, serum metabolites and liver functionality in Holstein fresh cows.

The aim of this study was to evaluate the effects of CLA supplementation in diets with different levels of forage NDF on performance, serum metabolites and liver functionality in Holstein fresh cows. Forty Cows were blocked based on their body condition score at calving and 305-d mature-equivalent...

Author(s) : Amanlou, H.; Farahani, T. A.; Farsuni, N. E.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.3 pp.fa171-fa186 ref.33

17. Comparison of differential expression profiles of candidate genes related to fertility traits using transcriptome perspective based on RNA-Seq in Holstein dairy cows.

Genetic selection for increasing milk production and economic profitability in the dairy industry has been associated with reduction in reproductive performance, including lower embryo survival and pregnancy loss. The main purpose of this study was to use the transcriptome profiles of endometrial...

Author(s) : Ghafouri, F.; Sadeghi, M.; Bahrami, A.; Abdollahi-Arpanahi, R.; Javanmard, A.; Miraei-Ashtiani, S. R.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.52 No.4 pp.fa217-fa229 ref.63

18. The effect of chemical and biological regulators of ph on histomorphometry and histopathology of rumen, reticulum, liver and kidney of Arabi lambs.

The aim of this study was to compare the effect of rumen pH-adjusting additives on histomorphometry and histopathology of rumen, reticulum, liver, and kidney. Twelve Arabi male lambs, 9±1 months old and initial body weight of 35.95±3.55 kg were used in a completely randomized design with three...

Author(s) : Vafaee, F.; Chaji, M.; Khorasani, O.; Baghban, F.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.52 No.4 pp.fa231-fa241 ref.33

19. Effects of feeding palmitic and stearic fatty acids on growth performance, nutrient digestibility and blood parameters of fattening lambs.

In order to investigate the effect of partial replacement of cereal grains with different levels of calcium saltd of palmitic and stearic saturated fatty acids on the performance of fattening lambs, 30 male Dalagh-Romanov lambs were used for 89 days. Experimental treatments included: 1- control...

Author(s) : Baee, H.; Ghooorchi, T.; Toghdory, A.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.52 No.4 pp.fa243-fa251 ref.29

20. Study on hepatozoon canis in dogs in Urmia region.

The aim of the present study was to detect Hepatozoon canis infection in dogs in Urmia municipality, northwestern Iran. The effects of age, sex, lifestyle, and tick infestation as risk factors in the incidence of the disease were studied. During years 2018 and 2019, a total of 246 whole blood...

Author(s) : Zeinali, M.; Malekifard, F.; Rakhshanpour, A.; Yakhchali, M.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.52 No.4 pp.fa253-fa260 ref.21

21. Comparison of the absorption kinetics and utilization of crystalline-free and protein-bound methionine sources in broilers with single-meal feed consumption.

This experiment was performed to compare the absorption kinetics and utilization of different methionine (Met) sources including synthetic-free crystalline DL-Met (DL-Met), L-methionine (L-Met) and dipeptide (Met-Met) and protein-bound methionine (PB-Met) in broilers with single-meal feed...

Author(s) : Zamani, M.; Zaghari, M.; Ghaziani, F.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.1 pp.1-11 ref.23

22. Effect of different sources of magnesium in prepartum diets on energy metabolism, performance, and health of Holstein cows.

The aim of this study was to evaluate the effect of different source of magnesium in prepartum diets on productive performance, blood metabolites, insulin resistance and health disorders in transition cows. Sixty cows from 21 days prepartum were randomly assigned to 4 experimental treatments....

Author(s) : Ehsanbakhsh, F.; Amanlou, H.; Shahir, M. H.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.1 pp.13-22 ref.32

23. The effect of fat supplement type on performance, nutrient digestibility and physiological parameters of finishing lambs during summer heat stress.

An experiment was performed to investigate the effects of using saturated and unsaturated fatty acids calcium salts on the production performance and some physiological traits of finishing lambs fattened under heat stress condition. Thirty-two cross bred Lori-BakhtiariRomanov lambs were randomly...

Author(s) : Mirshamsollahi, A.; Ganjkhanlou, M.; Fatehi, F.; Zali, A.; Sadeghi, M.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.1 pp.33-42 ref.29

24. Identification of single nucleotide polymorphism in Iranian Helmeted Guineafowl ecotypes to study the phylogenetic relationships and inbreeding.

The Helmeted Guineafowls were originated from West Africa and spread widely across the world, due to their ability to adapt to different environmental conditions. The main goal of this investigation was to identify the single nucleotide variations (SNVs) in order to explain the genetic structure of ...

Author(s) : Pedar, R.; Esmailizadeh, A.; Mehrgardi, A. A.; Asadollahpour-Nanaei, H.; Kharrati-Koopaee, H.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.1 pp.43-51 ref.30

25. The effect of using different unsaturated fat sources in starter diet on performance and metabolic parameters of early weaned Ghezel lambs.

The experiment was conducted to investigate the effect of using different fat sources in the starter diet on the growth and health parameters of early weaned Ghezel lambs. 20 female lambs of Ghezel sheep breed after birth and 4 weeks of breastfeeding was randomly divided into 4 groups of 5 heads (4 ...

Author(s) : Hajilu, M.; Pirmohammadi, R.; Khalilvandi-Behroozyar, H.; Asadnejad, B.

Publisher : University of Tehran, Tehran, Iran

Journal article : Iranian Journal of Animal Science (IJAS) 2022 Vol.53 No.2 pp.fa81-fa96 ref.54