ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (12): 2258-2267.doi: 10.11843/j.issn.0366-6964.2017.12.005

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A Study of Genomic Selection on Porcine Hematological Traits Using GBLUP and Penalized Regression Methods

ZHANG Qiao-xia1, ZHANG Ling-ni1, LIU Fei1, LIU Xiang-dong1, LIU Xiao-lei1, ZHAO Shu-hong1,2, ZHU Meng-jin1,2*   

  1. 1. Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China;
    2. The Cooperative Innovation Center for Sustainable Pig Production, Wuhan 430070, China
  • Received:2017-03-14 Online:2017-12-23 Published:2017-12-23

Abstract:

This study aimed to explore the application of GBLUP and penalized regression methods in genomic selection of the hematological traits in pigs. We chose 13 hematological traits from the immune resource population collected by our laboratory as the analyzed objects. We used the genotyping data of Illumina PorcineSNP60 Genotyping Beadchip to conduct the genomic selection analysis, in which GBLUP and 3 penalized regression methods (ridge, lasso and elastic-net) were used based on additive model and additive-dominance model. The results showed that the accuracy of genomic selection was positively correlated with estimated values of chip heritabilities of traits. The results of cross-validation analysis showed that the MCV (mean corpuscular volume) had the highest prediction accuracy among 13 hematological traits. The prediction accuracy of additive model and additive-dominance model were different in different traits. In total trend, the prediction accuracy of the lasso and elastic-net regressions were lower than that of the ridge regression and GBLUP. But in a few traits, such as NE%, it was opposite. In conclusion, there is no optimal genomic prediction method that could be suitable for all traits, and we should consider the genetic characteristics of the target traits when choosing a genome evaluation method. This research provides important reference information for the practical application of genomic selection for immune traits in pigs.

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