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21.
Barazandeh A Moghbeli SM Vatankhah M Hossein-Zadeh NG 《Tropical animal health and production》2012,44(4):929-934
Survival records from 1,763 Kermani lambs born between 1996 and 2004 from 294 ewes and 81 rams were used to determine genetic
and non-genetic factors affecting lamb survival. Traits included were lamb survival across five periods from birth to 7, 14,
56, 70, and 90 days of age. Traits were analyzed under Weibull proportional hazard sire models. Several binary analyses were
also conducted using animal models. Statistical models included the fixed class effects of sex of lamb, month and year of
birth, a covariate effect of birth weight, and random genetic effects of both sire (in survival analyses) and animal (in binary
analyses). The average survival to 90 days of age was 94.8%. Hazard rates ranged from 1.00 (birth to 90 days of age) to 1.73
(birth to 7 days of age) between the two sexes indicating that male lambs were at higher risk of mortality than females (P < 0.01). This study also revealed a curvilinear relationship between lamb survival and lamb birth weight, suggesting that
viability and birth weight could be considered simultaneously in the selection programs to obtain optimal birth weight in
Kermani lambs. Estimates of heritabilities from survival analyses were medium and ranged from 0.23 to 0.29. In addition, heritability
estimates obtained from binary analyses were low and varied from 0.04 to 0.09. The results of this study suggest that progress
in survival traits could be possible through managerial strategies and genetic selection. 相似文献
22.
The Effects of Brackish Water on Growth Hormone/Insulin‐like Growth Factor‐1 Gene Expression of the Caspian Trout,Salmo trutta caspius (Kessler, 1877), During the Early Stage of Smoltification
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23.
Calving records from the Animal Breeding Center of Iran collected from January 1983 to December 2007 and comprising 1 163 594 Holstein calving events from 2552 herds were used to evaluate the potential effect of abortion occurrence on 305‐day milk yield, milk fat yield, fat percentage of milk and milk protein yield in Iranian Holsteins. Statistical analyses of production traits were performed using a linear mixed model procedure. Normal‐calved cows had greater 305‐day milk production, fat yield and protein yield of milk than abortive‐calved cows (P < 0.05). However, abortive‐calved cows had the greater milk fat percentage than normal calved cows (P < 0.05). The linear and quadratic effects of age of dam were significant on all of the studied traits (P < 0.05). The results of regression analysis showed that increase in the quadratic effect of age can cause an increase in the fat percentage of milk for all calvings including normal and abortive calvings. Because abortion is one of the most important conditions that limit a cow's ability to produce, maintaining the general health of cattle is important in minimizing the risk of abortion problems. 相似文献
24.
Safari Abbas Shadparvar Abdol Ahad Ghavi Hossein-Zadeh Navid Abdollahi-Arpanahi Rostam 《Tropical animal health and production》2019,51(5):1209-1214
Tropical Animal Health and Production - Iranian buffalo plays a critical role in supplying a portion of the income and the necessities of the rural population. The first step to design a breeding... 相似文献
25.
Heidarieh M Mirvaghefi AR Akbari M Farahmand H Sheikhzadeh N Shahbazfar AA Behgar M 《Fish physiology and biochemistry》2012,38(4):1169-1174
Present study examined the effects of Ergosan on growth performance, digestive enzyme activities, hematological parameters and gastrointestinal structure of rainbow trout. Rainbow trout (mean weight 100–110 g) were fed basal diet (control) and diet treated with Aquavac Ergosan (5 g kg?1 of diet) for 50 days. Results of this study showed that Ergosan supplementation significantly increased weight gain (94.27 g vs. 65.04 g), specific growth rate (4.09 vs. 3.10) and feed intake (136.85 g vs. 111.22 g) and decreased feed conversion ratio (1.43 vs. 2.03) compared to control (P < 0.05). Lipase activity and leukocyte and erythrocyte count also increased in juvenile fish fed Ergosan-treated diet compared to control (P < 0.05). Light microscopy demonstrated that both groups of fish displayed normal morphology of proximal intestine and pyloric caeca. In Ergosan-treated group, higher percentage of goblet cell was shown in proximal intestine and pyloric caeca. Present study suggests that Ergosan effectively promotes growth performance, lipase activity and gastrointestinal structure in rainbow trout. 相似文献
26.
The objective of this study was to estimate heritability and genetic correlations between the liabilities of clinical mastitis (CM), milk fever (MF), metritis (MET), and retained placenta (RP) within the first three lactations of Holstein dairy cows. The records of 57,301 dairy cows from 20 large dairy herds in Iran between January 2005 and June 2009 were analysed with univariate and bivariate threshold animal models, using Gibbs sampling methodology. The final model included the fixed class effects of herd-year, season of calving, parity of dam, the linear covariate effect of age at calving, and the random direct genetic effect of animal. Posterior means of heritability for liabilities in first, second, and third lactations were 0.06, 0.08, and 0.09, respectively, for CM; 0.10, 0.12, and 0.11, respectively, for MF; 0.09, 0.07, and 0.10, respectively, for MET, and 0.07, 0.08, and 0.08, respectively, for RP. Posterior means of genetic correlations between disease liabilities were low or moderate (from −0.01 to 0.26). The results of this study indicated the importance of health traits for considering in the selection index of Iranian Holstein dairy cows. 相似文献
27.
H. R. Karimi A. Sajjadinia V. Baghari H. Farahmand 《Journal of plant nutrition》2013,36(14):2225-2235
Pistachio hull is a horticultural waste product obtained during dehulling process of pistachio nuts. This experiment was carried out to evaluate the effects of pistachio hull and rice husk compost, as culture medium, on vegetative and physiological characteristics of pothos (Scindapsus aureus) plants. Rooted cuttings were used as plant materials and cultured in pots (40 × 30cm) filled with the following media: S1 = 100% peat (control), S2 = 100% rice husk, S3 = 70% rice husk + 30% pistachio hull, S4 = 50% rice husk + 50% pistachio hull, S5 = 30% rice husk + 70% pistachio hull and S6 = 100% pistachio hull. The vegetative parameters were affected by media type, so that no plants survived in 100% pistachio hull. The application of 50% pistachio hull and 50% rice husk (S4), increased shoot fresh weight, and potassium (K) concentration of shoot and root compared to control. Fresh and dry root weight and phosphorus (P) concentration of shoot was increased with S2 treatment (100% rice husk). 相似文献
28.
Hadi Ghaffari Ahmad Tavakoli Mohammad Faranoush Ali Naderi Seyed Jalal Kiani Alireza Sadeghipour Davod Javanmard Mohammad Farahmand Saied Ghorbani Farnoush Sedaghati Seyed Hamidreza Monavari 《Iranian Biomedical Journal》2021,25(6):426
Background:Glioblastoma multiforme is the most invasive and lethal form of brain cancer with unclear etiology. Our study aimed to investigate the molecular prevalence of HCMV and EBV infections in patients with GBM. Methods:This case-control study was conducted on 42 FFPE brain tumor samples from GBM patients and 42 brain autopsies from subjects without neurological disorders. The presence of EBV and HCMV DNA was determined, using PCR and nested-PCR assays, respectively. Results:HCMV DNA was detected in 3 out of 42 (7.1%) of GBM samples and was absent from the control group (p = 0.07). Importantly, EBV DNA was detected in 9 out of 42 (21.4%) brain tissue specimens of GBM subjects, but again in none of the control group (p = 0.001). Conclusion:Our findings indicate that infection with EBV is associated with GBM. Key Words: Brain tumor, Epstein-Barr virus, Glioblastoma, Human cytomegalovirus 相似文献
29.
Novel droplet vitrification combined with fish antifreeze protein type III enhances cryoprotection of semen in wild endangered Persian sturgeon Acipenser persicus (Borodin, 1897)
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Amirreza Abed‐Elmdoust Hamid Farahmand Bagher Mojazi‐Amiri Gholamreza Rafiee Ruhollah Rahimi 《Aquaculture Research》2015,46(10):2392-2397
In this study, the efficiency of a novel droplet vitrification technique along with different doses of fish antifreeze protein (AFP) type III on Persian sturgeon thawed spermatozoa quality (motility duration and motility percentage) was investigated. Semen of seven male individuals was pooled in equal volumes and diluted with 4°C Tris‐Hcl (100 mM), pH = 8 extenders containing 0, 5, 10, 15 μM of AFP type III in a ratio of 1:1 (semen/extenders). Treated semen was dropped into liquid nitrogen. Solidified droplets were stored for 2, 60 and 120 days and thawed by plunging them into a tube containing 5 mL Tris‐Hcl (100 mM), pH=8 with 1% BSA at 37°C. Motility duration in all treatments had no significant difference comparing to fresh sperm (P > 0.05), but their motility percentage was significantly lower. Treatment with 10 μM of AFP had significantly higher motility percentage (16.11 ± 0.5%) comparing to other treatments (P < 0.05). There was no significant difference between 0, 5, 15 μM of antifreeze protein treatments (P > 0.05), suggesting that antifreeze protein effectiveness are highly dose dependent, and dose of 10 μM is appropriate in Persian sturgeon spermatozoa droplet vitrification. Besides, the present technique obtained higher quality of spermatozoa comparing to its analogue techniques. 相似文献
30.