seyyed ziaodin mirhosseini; Shahla Nematollahian; Seyed Hossein Hosseini Moghaddam; Navid Ghavi-Hossein-Zadeh; Ramin Abdoli; Yosof Kheikhah
Volume 24, Issue 1 , April 2022, , Pages 1-11
Abstract
The aim of the present study was to investigate the performance of the hybrids obtained by crosses of the six Japanese silkworm lines named IRA1, IRA3, IRA5, IRA7, IRA9, and IRA11 and six Chinese silkworm lines named IRA2, IRA4, IRA6, IRA8, IRA10, and IRA12. The new hybrids derived from these lines along ...
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The aim of the present study was to investigate the performance of the hybrids obtained by crosses of the six Japanese silkworm lines named IRA1, IRA3, IRA5, IRA7, IRA9, and IRA11 and six Chinese silkworm lines named IRA2, IRA4, IRA6, IRA8, IRA10, and IRA12. The new hybrids derived from these lines along with available commercial hybrids (as control groups) for six traits including cocoon weight, cocoon shell weight, cocoon shell percentage, best cocoon weight, pupation rate and best cocoon pupation rate were measured and recorded in spring 2020. The IRA7×IRA6 and IRA7×IRA12 hybrids had more performance in comparison with commercial hybrids in terms of productive traits including cocoon weight and cocoon shell weight (p<0.01), but, when productive and viability traits (pupation rate and best cocoon pupation rate) were considered together in an evaluation index, they were not among the selected hybrids. Commercial 31×32 hybrid in terms of cocoon shell weight and cocoon shell percentage had more performance in comparison with the other hybrids (new and commercial) (p<0.01). Hybrids had a significant difference for pupation rate and best cocoon pupation rate (p<0.01), and the IRA5×RA12, IRA1×IRA10 and IRA11×IRA6 hybrids showed the lowest mean for both traits in comparison with other hybrids (p<0.01). The obtained results showed that seven hybrids including IRA9×IRA2, IRA11×IRA2, IRA3×IRA6, IRA3×IRA2, IRA7×IRA4, IRA7×IRA10 and IRA7×IRA8 were greater than the minimum set for every six traits. Among these hybrids, some will be chosen in the commercial production line based on their performance in the field and regional experiments to supply the country's required silkworm eggs.
Farzaneh Sattari najaf abadi; Ardeshir Mohit; hossein Moravej; navid Ghavi Hosien-Zadeh; hassan darmani koohi; meisam tavakoli
Volume 23, Issue 1 , March 2021, , Pages 97-107
Abstract
This study was conducted to investigate the effects of two types of omega-3 calcium fat powders with animal and vegetable origin on productive performance, reproductive and egg quality of broiler breeder hens by using 60 hens and 20 roosters (65 weeks), in a completely randomized design with ...
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This study was conducted to investigate the effects of two types of omega-3 calcium fat powders with animal and vegetable origin on productive performance, reproductive and egg quality of broiler breeder hens by using 60 hens and 20 roosters (65 weeks), in a completely randomized design with five treatments and four replicates for two months. Experimental treatments were: 1- control (without fat powder); 2- 1.5% animal omega-3 calcium fat powder based on fish oil; 3- 3% animal omega-3 calcium fat powder based on fish oil; 4- 1.5% vegetable omega-3 calcium fat powder based on flaxseed oil; 5- 3% vegetable omega-3 calcium fat powder based on flaxseed oil. Egg production percentage and economic benefit of hens fed with diets containing 1.5% animal and vegetable fat powders were greater than hens that received 3% of them (p<0.05). The highest concentration of yolk docosahexaenoic acid and docosahepanthanoic acid were in eggs of hens fed with diet containing 3% animal and vegetable fat powder and thelowest concentration of linolenic acid was in the yolk of eggs obtained from control hens or hens fed with diet containing 1.5% animal fat powder (P<0.05). The lowest percentage of hatchability and the highest omega-6: omega-3 ratio were related to hens received control diet (P<0.05). Based on current results, adding animal or vegetable omega-3 calcium fat powder at the level of 1.5% in old broiler breeder hen’s diet, without negative effect on performance, improve hatchability and yolk fatty acid composition and is economically more affordable.
Zahra Alimoradi Tamrin; Hassan Darmani Kohi; navid gavi hosseinzadeh
Volume 20, Issue 1 , May 2018, , Pages 1-14
Abstract
In order to investigate the effects of Galbanum essential oil (GEO) and xylanase on performance and intestinal microflora of broiler chicks, a total of 160 one-day old chicks (Ross 308 strain) were used to four dietary treatments based on a completely randomized design in a factorial arrangement. The ...
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In order to investigate the effects of Galbanum essential oil (GEO) and xylanase on performance and intestinal microflora of broiler chicks, a total of 160 one-day old chicks (Ross 308 strain) were used to four dietary treatments based on a completely randomized design in a factorial arrangement. The factors included were xylanase (0 and 0.2 gr/kg of diet) and GEO (0 and 0.1 gr/kg of diet). During the experimental periods (0-10 d, 11-24 d and 25-42 d), body weight gain (BWG), feed intake and feed conversion ratio (FCR) were measured. At days 21 and 42 of age two chicks from each replicate were slaughtered to determine carcass characteristic and ileal microbial populations of E. coli and Lactobacillus. Adding enzymes to the diet increased BWG in growing period and improved FCR in the growing and in the entire period of the experiment. At 21 day of age, GEO supplementation alone or GEO and xylanase as mixed significantly (P