Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211420200401Genetic Evaluation For Some Economically Importance Variables In Friesian Cows1331369582310.21608/jappmu.2020.95823ENAnas A. A.BadrAnimal Production Research Institute, Ministry of Agriculture and Land Reclamation, Nadi El-Said Str., Dokki, Giza, Egypt;Asmaa A. A.AmerAnimal Production Department, Faculty of Agric., Tanta Univ., Egypt.Journal Article20200614A total of 1018 standard lactating of Friesian cows, progeny of 54 sires and 432 dams kept at Sakka Experimental farm, during 2012 to 2017 are used to calculate phenotypic and genetic effects for milk production in tenth months (MP), lactation length (LL) and fat percent (F%). Four selection indexes are calculated using relative economic weights (REW), method 1: standard deviation (REW<sub>1</sub>) and method 2: Lamont method (REW<sub>2</sub>). The overall means of MP, LL and Fat % are 3879 kg, 301 d and 3.69%, respectively. Month, year of parturition and lactation order had significant (P<0.01) effects on all studied traits, except month of parturition and lactation order effects (P>0.05) on F%. Bulls and cow within bulls had significant (P<0.01) effects on all traits studied. Heritability estimates are 0.32, 0.10 and 0.55 for MP, LL and Fat %, respectively. Genetic correlations among three variables are significant and ranged from 0.21 to 1.00. The basic index (Index<sub>1</sub>), which includes the three variables MY, LL and Fat % was the best (had the highest accuracy (R<sub>IH</sub>) and relative efficiency values (R<sub>IH</sub> was 0.87 and 0.88 for REW<sub>1</sub> and REW<sub>2</sub>, respectively).Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211420200401Effect of Long-Term Supplementation of Selenium on Wool Production and Quality in Sheep1371419582410.21608/jappmu.2020.95824ENE. M.SaudiAnimal production department, Faculty of Agriculture, Al-Azhar University , Cairo, Egypt.R. M.GheetasAnimal production department, Faculty of Agriculture, Al-Azhar University , Cairo, Egypt.Journal Article20200614Selenium is an essential trace element for wool growth and its characteristics especially during the exposure of animals to stress. Twenty adult, dry, non-pregnant ewes aged 3-4 years old ranging from 45 to 50 kg body weight ,were chosen for the trial and divided into two equal groups, each of 10 ewes. The ewes were fed on a formed diet according to National Research Council (1985). The control group was fed on the formed diet without any supplements. The treated group was fed on the same diet plus 0.33gm selenoprotein (0.7 available selenium)The trial lasted for one year. The grease Fleece Weight(GFW), Clean Fleece Weight(CFW), FibreDiametre(FD), Staple Length(STL), Fibre Length(FL), Staple Strength(SST), Elongation percentage(ELO%) and Glutathione Peroxidase enzyme(GPX) in the blood serum were measured to study the effect of long term supplementation of selenium on wool production and quality in sheep. GFW, CFW, STL and FL weren’t affected significantly. The FD in tip portion was affected significantly P≤ 0.5 by the addition of selenoproten to the diet of the ewes. There was a significant difference between treated and untreated group in the sulphur content of the tip. The GPX was significantly higher in the treated group compared to control one. No significant difference between treated and untreated group in SST and elongation percentage.Addition of selenium to the diet of dry – non pregnant ewes didn’t greatly affect wool production or quality in natural environmental conditions since there were no stresses on animals. Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211420200401Effects of Creatine and Guanidinoacetic Acid as Feed Additives on Nile Tilapia (Oreochromis niloticus) Growth Performance1431479582810.21608/jappmu.2020.95828ENM. M.MabroukAnimal Production Department, Faculty of Agriculture in Cairo, Al-Azhar University, Egypt.A. F. B.AbdelhamidAnimal Production Department, Faculty of Agriculture in Cairo, Al-Azhar University, Egypt.A. G. A.GewidaAnimal Production Department, Faculty of Agriculture in Cairo, Al-Azhar University, Egypt.Hanan A. M.Abo-StateFish Nutrition Lab, Animal Production Department, National Research Centre. Dokki, Egypt.Journal Article20200614This study was designed to investigate the effect of Creatine (Cr) and Guanidinoacetic acid (GAA) as feed additives on growth performance, feed utilization and body composition of sex reversed (male) Nile tilapia (<em>Oreochromis niloticus</em>) fingerlings. Creatine and Guanidinoacetic acid play an important role in metabolism and can be applied in aquaculture for improving the growth performance, feed utilization and carcass composition of aquatic animals.Nile tilapia (10.4±0.4 g / fish) were fed a commercial diet (30% crude proteinand gross energy 4120.7 Kcal/kg.) supplemented with different additives of Cr and GAA (0.8 and1.2g / kg diet). Fish were randomly distributed (in triplicates) into 5 treatments (control, Cr 0.8, Cr 1.2, GAA 0.8 and GAA 1.2 g/ kg diet). Treatments were performed in 15 concrete ponds (1x4 m each). Fish were fed three times a day for 12 weeks at 4% of their body weight. The optimum growth performance, feed utilization and body composition were obtained at 1.2g GAA/ kg diet. The GAA in Nile tilapia diet was promising for enhancing the growth performance in Nile tilapia which may improve fish production. Using GAA is beneficial in aquaculture, definitely on Nile tilapia farming.Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211420200401Effect of Partial Replacement of Protein Sun Flower Meal by Azolla Meal as Source of Protein on Productive Performance of Growing Lambs1491539583310.21608/jappmu.2020.95833ENM. H.Abou El-FadelAgricultural Research Center, Animal Production Research Institute, (APRI) Giza, Egypt.Hanan A. M.HassaneinAgricultural Research Center, Animal Production Research Institute, (APRI) Giza, Egypt.Heba A.El-SanafawyAgricultural Research Center, Animal Production Research Institute, (APRI) Giza, Egypt.Journal Article20200614The evaluation of the effect of partial replacing protein of sun flower meal (SFM) by protein of azolla meal in concentrate feed mixture (CFM) on growth performance, digestibility, feed intake and conversion and economic feed efficiency of growing lambs it was the aim of the present study. 15male crossbred (Osimi X Flelandi) were divided into 3 equal groups T1, T2 and T3 fed on CFM containing 0, 10 and 20% azolla meal replacing 0,25 and 50%protein of SFM respectively. Results showed that, integrated azolla meal with experimental rations resulted in decreasing the digestibility of DM,OM,CP and NFE and feeding value as TDN and DCP with R2 and R3 rations compared to those of R1 which had highest means (65.61,72.08, 69.69, 77.45,69.81and 8.37,respectively). While, digestion coefficients of CF and EE increased with integrated azolla in rations with highest value in R3.T1 recorded the highest average of final body weight (40 kg) and T3 recorded the lowest average (38.4kg) with insignificant differences among tested groups. Also total body weight gain and average daily gain decreased from T1 up to T3 with insignificant differences among experimental groups. Economic feed efficiency(%) recorded the best value(2.28%) in T2 which had 10% azolla meal followed by T3 which had 20% azolla meal and the lower value (2.15) in T1. The results concluded that dietary insert of azolla meal up to level 10% instead of SFM had positive impact on economic feed efficiency of growing crossbred lambs without any adverse effect on the performance of the animals.Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211420200401In Vivo and In Vitro Dromedary Camel Embryos’ Production under Egyptian Conditions1551619583410.21608/jappmu.2020.95834ENAmira Kh.KhattabAnimal and Poultry Production Division, Desert Research Center, 11753, Cairo, Egypt.
/ Embryology Department, Faculty of Science, El- Azhar University, Egypt.Nehal A.Abu ElnagaEmbryology Department, Faculty of Science, El- Azhar University, Egypt.Kh. A.El-BahrawyAnimal and Poultry Production Division, Desert Research Center, 11753, Cairo, Egypt.Journal Article20200614The aim of the present study was to compare between <em>in vivo</em> and <em>in vitro</em> production of dromedary camel embryos under Egyptian conditions. At <em>in vivo</em> experiment, three female camels (donors) were treated with a one-shot injection of 3000 IU PMSG, followed by induction of ovulation treatment (i.m. administration of 5000 IU hCG). Natural mating was performed after 8 days from the superovulation treatment. Embryos were flushed via non-surgical collection after eight days of animal mating. For <em>in vitro</em> experiment the oocytes were retrieved by slicing ovaries collected from the slaughterhouse. Recovered oocytes were examined before and after IVM culture for grading and investigating cytoplasmic maturation. Only good-quality oocytes were selected (n=72). Cumulus oocytes complexes (COCs) were incubated at 38.5 ºC, 5% CO2 and 95% humidity for 40 hours. Matured COCs were inseminated with frozen-thawed semen (3x10<sup>6</sup> spermatozoa/mL) in the fert-TALP medium at 38.5 ºC, 5% CO<sub>2</sub> and 95% humidity for 18 hours. Results showed that the <em>in vivo</em> embryos recovery rate was 74.92%. The hormonal treatment had no significant effect on the activity of ovaries regarding ovarian side. For <em>in vitro</em> experiment the mean oocyte yield was 9.83 COCs per ovary and the recovery rate (%) was 37.5%. The maturation rate of dromedary oocytes <em>in vitro</em> was 72.72%, while the fertilization rate was 11.5%. In conclusion, this study showed that <em>in vivo</em> embryo production can be considered as an effective tool for embryo in dromedary camels when compared to embryo production <em>in vitro.</em>