نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه علوم دامی، دانشکده کشاورزی، دانشگاه تهران، کرج، ایران.
2 گروه علوم دامی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران، کرج، ایران.
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The objective of this study was to investigate single step genomic BLUP (ssGBLUP) evaluation in different scenarios with different numbers of genotyped animals, pedigree errors and heritability using simulated data for weening weight of lambs. Different scenarios were simulated based on heritability and pedigree error, each of them with three levels, and genotyped animals based on five levels. Accuracy and response to selection were studied to compare different scenarios. The R environment and SAS software was used to perform the simulation steps. With the increase in the percentage of genotyped animals in the ssGBLUP evaluation, the accuracy of selection increased and at different levels of heritability selection accuracy showed less difference. The mean accuracy in the scenario of non-genotyped animals with different levels of pedigree error and heritability was 0.5, and for the scenario with 100% of genotyped animals it was equal to 0.79. In the scenario with non-genotyped animals, pedigree error levels had an inverse relationship with the accuracy of the ssGBLUP evaluations. By increasing the percentage of genotyped animals, the effect of pedigree error with the accuracy of ssGBLUP evaluations becomes less. Also, with the increasing number of genotyped animals, response to selection mean increased. Pedigree error showed a significant effect in a scenario with non-genotyped animals. When the number of genotyped animals added the effect of pedigree error was adjusted and its effect on the response to selection rate decreased. According to obtained results, ssGBLUP evaluation is a suitable choice for genetic analysis of small animal populations.
کلیدواژهها [English]
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