HamidReza Dadkhah; GholmReza Ghorbani; Farzad Hashemzadeh; Abbas Rajaeerad
Volume 25, Issue 1 , April 2023, , Pages 13-24
Abstract
The objective of this study was to evaluate the effect of feeding two oral Ca boluses at calving and 12 h later on feed intake, milk yield, body weight (BW) changes, blood calcium and some reproductive parameters of high producing dairy cows during summer season. Twenty-four Holstein cows with average ...
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The objective of this study was to evaluate the effect of feeding two oral Ca boluses at calving and 12 h later on feed intake, milk yield, body weight (BW) changes, blood calcium and some reproductive parameters of high producing dairy cows during summer season. Twenty-four Holstein cows with average parity of 2.8 ± 0.8 were selected and randomly assigned to one of two treatments including control or the group receiving slow-release oral Ca bolus at calving and 12 h post-calving. Row milk yield was greater in cows receiving Ca boluses compared to control treatments during 21 days of lactation (P = 0.02). The milk fat (P = 0.01) and solid non-fat percentage (P = 0.05) were greater in cows that received calcium bolus compared to control treatment. In addition, energy-corrected and fat-corrected milk yields increased in cows received Ca bolus (P = 0.03). Plasma glucose and serum calcium concentration as well as BW change were not affected by experimental treatments. The pregnancy per artificial insemination, days to first insemination and open days were not significantly different between the experimental treatments (P >0.05). The results showed that using oral calcium bolus at calving and 12 hours after calving improved milk production and composition, but had no effect on serum Ca, BW change during first 21 days of lactation, and reproduction parameters.
Esameel Rouzrokh; Armin Towhidi; saeed zaeinoaldini; Mojtaba Emamverdi
Volume 24, Issue 4 , December 2022, , Pages 501-509
Abstract
The aim of the present study was to compare sponge and cider with two different brands in estrous synchronicity, vaginal health and off-breeding performance in Moghani ewes. For this purpose, 120 ewes of Moghani breed were selected and randomly divided into four experimental groups. Ewes in the first ...
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The aim of the present study was to compare sponge and cider with two different brands in estrous synchronicity, vaginal health and off-breeding performance in Moghani ewes. For this purpose, 120 ewes of Moghani breed were selected and randomly divided into four experimental groups. Ewes in the first and second groups, using sponge Sponjavet and CIDER Eazi breed (as valid and common brands) for 12 days, respectively, and the third and fourth groups, respectively, using sponge Fluorojest and CIDER Progest (as New brands made jointly by Iran and China) were treated for 12 days. Ewes in all groups received 400 IU units of eCG at the time of sponge and cider harvest. The rate of vaginal mucosal discharge and adhesion in sponge was higher than cider (P< 0.01). However, there was no significant difference between reproduction and progesterone concentrations between CIDER and sponge as well as brands of these two tools.Therefore, due to lower price and similar efficiency, Sponge Fluorojest and CIDER Progest can be considered as an appropriate alternative to common commercial sponge and CIDER..
Parvin Shariati Gazgazareh; ALI AKBAR MASOUDI; Rasoul Vaez Torshizi; Alireza Ehsani; Zaynab Mousavian
Volume 22, Issue 2 , June 2020, , Pages 199-209
Abstract
The aim of this study was the investigation of gene expression profile in Shal sheep ovarian tissue using RNA sequencing data. For this purpose, the ovaries of five Shal sheep were isolated after estrous synchronization and their RNA was sequenced using Illumina Hiseq 4000 technology. On average, ...
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The aim of this study was the investigation of gene expression profile in Shal sheep ovarian tissue using RNA sequencing data. For this purpose, the ovaries of five Shal sheep were isolated after estrous synchronization and their RNA was sequenced using Illumina Hiseq 4000 technology. On average, the data obtained from the sequencing consisted of 26638311 read pairs with 81.08 unique mapping rate. The results of bioinformatic analyzes revealed the expression of 21085 genes in Shal sheep ovarian tissue, of which 15078 genes had expression mean above 10. Gene ontology analysis revealed the significant enrichment of 162 GO terms including 41 biological processes, 46 molecular functions and 75 cellular components. KEGG pathway analysis also identified 149 significant pathways (P <0.05), most important of which were estrogen signaling pathway, TGF-beta signaling pathway and oocyte meiosis. Investigating the expression of major genes for twining and reproduction, showed a high expression for INHA, INHBA and BMPR1B, so that INHA, an important paracrine factor in ovarian follicles, was one of the 10 genes with the highest expression. Also, FSHR, ESR1 and ESR2 showed medium expression and GDF9, BMP15 and PRLR showed low expression in the samples. For the first time, in this study the ovarian tissue transcriptome of Shal ewes was comprehensively studied using RNA-Seq technology and this study can provide a useful genetic basis for a better understanding of the genes and processes involved in the Shal sheep reproduction.
Volume 19, Issue 1 , May 2017, , Pages 213-222
Abstract
The aim of this study was to compare the effect of glycogenic and/or lipogenic diets fed in Baluchi ewes treated with an estrus synchronization method to reduce delivery distance and improving reproductive parameters. Ninety heads of Baluchi ewes selected and randomly placed into three parallel groups. ...
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The aim of this study was to compare the effect of glycogenic and/or lipogenic diets fed in Baluchi ewes treated with an estrus synchronization method to reduce delivery distance and improving reproductive parameters. Ninety heads of Baluchi ewes selected and randomly placed into three parallel groups. Each ewe of group was fed in with three different diets based on the fat and starch sources. In order to do the estrus synchronization, all ewes were put CIDR in 30 day of the trial. After 14 days, they were removed, then four hundred IU eCG hormone were injected. As soon as estrus signals was observed, ewes were inseminated. Ultrasonography was done to observe the number of dominant follicle, CL and pregnancy diagnosis. After parturition, reproductive parameters like lambing and twining rate were analyzed. The most of examined ewes showed clearly estrus signals. The consequence of ovary sonography did not indicate significant effect in average of dominant follicles numbers among the experimental diets. The number of dominant follicles was increased significantly from time of estrus to artificial insemination. Ovulation, pregnancy and twining rate were considerably (P< 0.05) higher in glycogenic and glycogenic+lipogenic rations compared with lipogenic ration. Generally, the feeding of starch source alone and or along with low proportion of fat sources might improve the effect of estrus synchronization on reproductive performance of Baluchi ewes.
Saleh Tabatabaei Vakili; Morteza Mamouei
Volume 18, Issue 2 , June 2016, , Pages 397-408
Abstract
In this Research, effect of bovine serum albumin (BSA) on motility and fertility of indigenous rooster spermatozoa was evaluated using 20 and 48 indigenous roosters and hens, respectively. Semen was collected and pooled. In the first experiment, the pooled semen was diluted and divided into four aliquots.The ...
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In this Research, effect of bovine serum albumin (BSA) on motility and fertility of indigenous rooster spermatozoa was evaluated using 20 and 48 indigenous roosters and hens, respectively. Semen was collected and pooled. In the first experiment, the pooled semen was diluted and divided into four aliquots.The treatments were included the diluted semen without BSA and with 1% BSA; In each group, spermatozoa motility was evaluated during 30 minutes of semen collection and 24 hours after semen storage in 4°C. Spermatozoa motility parameters were evaluated by computer assisted sperm analysis and routine methods. In the second experiment, hens were divided into 4 groups with 12 hens in each group and fresh diluted semen without BSA and containing 1% BSA as well as stored diluted semen without BSA and containing 1% BSA were inseminated. The eggs were incubated and proportion of fertile egg in each treatment group was recorded. By adding 1% BSA into the diluted semen of indigenous rooster, sperm motility parameters and fertility rate were not affected in fresh semen. However, after 24 hours of semen storage in liquid condition, BSA significantly preserved motility and fertility potential of spermatozoa (P<0.05). In conclusion, BSA improved the spermatozoa motility and fertility of indigenous rooster in liquid storage for 24 hours.