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  • 1
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    Unknown
    Rainbow trout broodstock and progenies registration and selection of Yasouj Fishery Research Center in order to breeding (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Frequently,the development of quantitative traits in livestock based on breeding programs has been more important.In spite of higher selection response in fish than in farm animal, it is no progress in fish breeding programs in some regions such as IRAN, because of little information of genetic variation of stock, disconstructed or undesigned base population, the deterioration of genetic resourse and don’t well informed educated researchers,extension workers and aquaculturists in breeding theory and its practical issues. At first step,in Yasouj Coldwater Fishes Breeding Research Center, in order to conducting combined selection program in rainbow trout broodstock as base population and their offsprings in mixed age parents,150 female and male broods with higher mean weight were selected,striped in 6 stage and eggs were incubated.One-year Fishes(45000 pcs.) of the six groups with higher mean weight in 5 stage were selected(438 pcs.) and remainder was discarded. Before selection, a few fishes of six aged-groups as control group were cultured apart. Difference(p〈0.05) induced between mean weight of the selected groups and with control group was because of age difference in them and of no deletion in control group(don’t throw out small individuals) by selection.The whole groups don’t have significant difference (p〉0.05) in FCR and FER. Based on results, it isn’t told that difference between experimental and control groups is a result of genetic improvement of growth rate trait induced of selection process in one generation and the continue of this program for several generations in order to reveal the development of a quantitative trait is unevitable and mating of selected broods(438 fish) in a crossbreeding program and the selection of offsprings is essential.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Rainbow trout ; Breeding ; Selection ; Broodstock ; Genetic variation ; Genetic ; Growth Rate ; Generation
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 26pp.
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  • 2
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    Unknown
    Investigation of chromosome and ploidy levels of Rainbow trout produced from imported eyed eggs. (2018)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    Details
    Publication Date: 2021-05-19
    Description: Rainbow trout is the main cultural species of coldwater fishes in iran. Often, aquaculturists intend to breeding in order to production of lines with higher growth rate potential and disease resistant. Nevertheless in the country, no trout breeding programs, has been performed yet and most of the farms focused on the cultivation of the first(unbred) race. While European countries progressed in trout breeding techniques and production lines with higher growth through genetic manipulation (chromosomal number and type changes of fish) and/or selection and their fish products derived from this technology, including eyed eggs and so on have sold to other regions of the world(eg: Iran). In this study, some biological parameters including survival, growth, feed conversion ratio (FCR.) and chromosomal number of two juvenile groups from imported( group 1) and native(group 2) eyed fish eggs were compared. For chromosomal investigation, blood smear test and flow cytometry were performed. sults showed a significant difference (P≤5%) in growth rate of native fishes and French group Native fish feed conversion ratio (0.9) was significantly difference (P≤5%) from that of French fishes (1.15). Chromosomal analysis showed no difference in chromosome number in treatments and two fish groups were 2n chromosome. Based on the results,the fishes of group 1 had faster grow potential and gain weight in less time than that of group 2 and this has been achieved to go through the process of selection and femenizatiom without any change in number of ploidy. Whereas the ability of native fishes in food efficiency( lower FCR.) was better. However, the reduction of rearing period is the benefit and preference of cultivation of imported or origionally foreign.
    Description: Iranian Fisheries Science Research Institute
    Description: Published
    Keywords: Imported eyed egg ; Native fish ; Ploidy level ; Growth ; Rainbow trout ; Chromosome ; Species ; Breeding ; FCR
    Repository Name: AquaDocs
    Type: Report , Refereed
    Format: 30pp.
    Location Call Number Expected Availability
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    PAPER (OA)
  • 3
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    Unknown
    Investigation of chromosome and ploidy levels of rainbow trout produced from imported eyed eggs (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25825 | 18721 | 2018-10-13 10:43:05 | 25825 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Rainbow trout is the main cultural species of coldwater fishes in iran. Often, aquaculturists intend to breeding in order to production of lines with higher growth rate potential and disease resistant. Nevertheless in the country, no trout breeding programs, has been performed yet and most of the farms focused on the cultivation of the first (unbred) race. While European countries progressed in trout breeding techniques and production lines with higher growth through genetic manipulation (chromosomal number and type changes of fish) and/or selection and their fish products derived from this technology, including eyed eggs and so on have sold to other regions of the world (eg: Iran). In this study, some biological parameters including survival, growth, feed conversion ratio (FCR.) and chromosomal number of two juvenile groups from imported( group 1) and native(group 2) eyed fish eggs were compared. For chromosomal investigation, blood smear test and flow cytometry were performed. sults showed a significant difference (P≤5%) in growth rate of native fishes and French group Native fish feed conversion ratio (0.9) was significantly difference (P≤5%) from that of French fishes (1.15). Chromosomal analysis showed no difference in chromosome number in treatments and two fish groups were 2n chromosome. Based on the results, the fishes of group 1 had faster grow potential and gain weight in less time than that of group 2 and this has been achieved to go through the process of selection and feminization without any change in number of ploidy. Whereas the ability of native fishes in food efficiency ( lower FCR.) was better. However, the reduction of rearing period is the benefit and preference of cultivation of imported or origionally foreign.
    Keywords: Aquaculture ; Biology ; Iran ; Imported eyed egg ; Native fish ; Ploidy level ; Growth ; Rainbow trout ; Chromosome ; Species ; Breeding ; FCR
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 30
    Location Call Number Expected Availability
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    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Rainbow trout broodstock and progenies registration and selection of Yasouj Fishery Research Center in order to breeding (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25456 | 18721 | 2018-09-25 18:08:14 | 25456 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Frequently,the development of quantitative traits in livestock based on breeding programs has been more important. In spite of higher selection response in fish than in farm animal, it is no progress in fish breeding programs in some regions such as IRAN, because of little information of genetic variation of stock, disconstructed or undesigned base population, the deterioration of genetic resourse and don’t well informed educated researchers, extension workers and aquaculturist in breeding theory and its practical issues. At first step, in Yasouj Coldwater Fishes Breeding Research Center, in order to conducting combined selection program in rainbow trout broodstock as base population and their off springs in mixed age parents,150 female and male broods with higher mean weight were selected, striped in 6 stage and eggs were incubated. One-year Fishes(45000 pcs.) of the six groups with higher mean weight in 5 stage were selected(438 pcs.) and remainder was discarded. Before selection, a few fishes of six aged-groups as control group were cultured apart. Difference (p〈0.05) induced between mean weight of the selected groups and with control group was because of age difference in them and of no deletion in control group(don’t throw out small individuals) by selection. The whole groups don’t have significant difference (p〉0.05) in FCR and FER. Based on results, it isn’t told that difference between experimental and control groups is a result of genetic improvement of growth rate trait induced of selection process in one generation and the continue of this program for several generations in order to reveal the development of a quantitative trait is unevitable and mating of selected broods (438 fish) in a crossbreeding program and the selection of off springs is essential.
    Keywords: Aquaculture ; Iran ; Yasouj ; Rainbow trout ; Breeding ; Selection ; Broodstock ; Genetic variation ; Genetic ; Growth Rate ; Generation
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 26
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER (OA)
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