نتایج جستجو برای: genomic selection

تعداد نتایج: 424739  

The development of genomic selection has created new strategies in animal breeding programs. The aim of this study was to investigate the efficiency of genomic selection in breeding programs of native hens. In this study, a reference scenario with 3380 birds using pedigree and phenotypic information was simulated and the expected genetic progress was derived deterministically with the software ...

Journal: :علوم دامی ایران 0
زینب منظری دانشجوی کارشناسی ارشد، گروه علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج حسن مهربانی یگانه دانشیار، گروه علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج اردشیر نجاتی جوارمی دانشیار، گروه علوم دامی، دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران، کرج محمد حسین مرادی استادیار، دانشکدۀ کشاورزی و منابع طبیعی دانشگاه اراک محسن قلی زاده استادیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری

selective signatures in whole genome can help us to understand the mechanisms of selection and to identify the genomic regions that have been under natural or artificial selection during long years. the objective of this study was to identify the genomic regions that have been under artificial and natural selection in baluchi and zel sheep breeds. 143 sheep from baluchi (n=96) and zel breeds (n...

اسلمی نژاد, علی اصغر , تیموریان, محمد , شریعتی, محمد مهدی ,

Genomic selection combines statistical methods with genomic data to predict genetic values for complex traits.  The accuracy of prediction of genetic values ​​in selected population has a great effect on the success of this selection method. Accuracy of genomic prediction is highly dependent on the statistical model used to estimate marker effects in reference population. Various factors such a...

Journal: :Journal of Animal Breeding and Genetics 2007

پایان نامه :0 1392

it is definitely necessary to understand the concept and behavior of causation of life insurance policies and its determinants for insurance managers, regulators, and customers. for insurance managers, the profitability and liquidity of insurers can be increasingly influenced by the number of causation through costs, adverse selection, and cash surrender values. therefore, causation is a materi...

Journal: :پژوهش های علوم دامی ایران 0
محمد تیموریان علی اصغر اسلمی نژاد محمد مهدی شریعتی

introduction: genomic selection refers to selection decisions based on genomic breeding values (gebv). the gebv are calculated as the sum of the effects of dense genetic markers across the entire genome, thereby potentially capturing all the quantitative trait loci (qtl) that contribute to variation in a trait. the qtl effects, inferred from markers, are first estimated in a large reference pop...

Linkage disequilibrium (LD) is bases of genomic selection, genomic marker imputation, marker assisted selection (MAS), quantitative trait loci (QTL) mapping, parentage testing and whole genome association studies. The Particular alleles at closed loci have a tendency to be co-inherited. In linked loci this pattern leads to association between alleles in population which is known as LD. Two metr...

Journal: :علوم دامی ایران 0
هادی آتشی استادیار، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه شیراز نرجس گرگانی فیروزجاه کارشناس ارشد، گروه علوم دامی، دانشکدۀ کشاورزی، دانشگاه شیراز

genomic selection is a method to predict the breeding values of individuals using a large number of single nucleotide polymorphism markers. the cost of the high-density marker panel genotyping is very high, which prevents the widely application of genomic selection. the present simulation study was carried out to evaluate the use of low to medium marker density panels to predict direct genomic ...

G.R. Dashab, M. Rokouei M. Vafaye Valleh M.M. Shariati S. Barjasteh

In order to have successful application of genomic selection, reference population and marker density should be chosen properly. This study purpose was to investigate the accuracy of genomic estimated breeding values in terms of low (5K), intermediate (50K) and high (777K) densities in the simulated populations, when different scenarios were applied about the reference populations selecting. Af...

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