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Title

Effects of misidentification and paternity errors on prediction of breeding values and ranking of animals in dairy cattle

Pages

  535-544

Abstract

 Genetic evaluations are computed to assess the genetic merit of animals based on mixed model equations. An important assumption for setting up these equations is that all genetic relationships among animals are available and correct. The objectives of the present study were to estimate the effects of incomplete pedigree and paternity errors on genetic evaluation. Data and pedigree of 100 dairy herds were obtained from Animal Breeding Center of Iran. Final data edited included milk yield records from 302860 first lactation Holstein cows. DMU Trace program was used for tracing ancestors and creating the full pedigree of animals. To simulate incomplete and wrong pedigrees, different scenarios including 8, 12, 16, 20, 24 percent of paternal identifi cation numbers were removed or replaced using R program. Breeding values for milk yield was predicted by animal model using DMU program. Spearman's rank correlation was estimated for superior animals in different scenarios using SAS software. Estimates of heritability for full, incomplete and wrong pedigrees were 0. 29, 0. 26 and 0. 27, respectively. The results showed a high variation in ranking of animals and determination of superior animals (P<0. 01). As an example, at 12% level scenario, Spearman's rank correlation of BVs predicted from full pedigree with incomplete and wrong pedigrees were 0. 65 and 0. 60, respectively. selection effectiveness, defined as the ratio of common superior animals in alternative scenarios, was decreased by increasing the rate of misidentification and errors (P<0. 01). Incorrect pedigree and misidentification of animals could reduce accuracy of breeding values and consequently bias in animals ranking.

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    APA: Copy

    RAZMKABIR, MOHAMMAD, Fathi, Farid, & ABDOLLAHI ARPANAHI, ROSTAM. (2019). Effects of misidentification and paternity errors on prediction of breeding values and ranking of animals in dairy cattle. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), 49(4 ), 535-544. SID. https://sid.ir/paper/651168/en

    Vancouver: Copy

    RAZMKABIR MOHAMMAD, Fathi Farid, ABDOLLAHI ARPANAHI ROSTAM. Effects of misidentification and paternity errors on prediction of breeding values and ranking of animals in dairy cattle. IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES)[Internet]. 2019;49(4 ):535-544. Available from: https://sid.ir/paper/651168/en

    IEEE: Copy

    MOHAMMAD RAZMKABIR, Farid Fathi, and ROSTAM ABDOLLAHI ARPANAHI, “Effects of misidentification and paternity errors on prediction of breeding values and ranking of animals in dairy cattle,” IRANIAN JOURNAL OF ANIMAL SCIENCE (IRANIAN JOURNAL OF AGRICULTURAL SCIENCES), vol. 49, no. 4 , pp. 535–544, 2019, [Online]. Available: https://sid.ir/paper/651168/en

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