ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (2): 268-275.doi: 10.11843/j.issn.0366-6964.2016.02.008

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Estimation of the Kinship Coefficient in Simmental Cattle Based on SNP Markers

ZHANG Jing-jing1,2,GAO Hui-jiang2,WU Yang2,ZHU Bo2,QI Xin2,GAO Xue2,ZHANG Lu-pei2,CHEN Yan2*   

  1. (1.College of Animal Science and Technology,Jilin Agricultural University,Changchun 130118,China;2.Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,China)
  • Received:2015-03-30 Online:2016-02-23 Published:2016-02-23

Abstract:

The objective of the study was to determine the number of SNPs which could efficiently estimate the kinship coefficient in Simmental cattle.1 059 Simmental cattle born between 2008 and 2012 year were used as the reference population.Based on the interval of the minor allele frequency (MAF),100,500,1 000,1 500,2 000,2 500 and 3 000 SNPs located in Illumina bovineHD(770 k)chip were selected to estimate individual kinship coefficient.The results showed that with the increase of the SNPs’ number,the estimation accuracy showed an increasing trend as well.Especially,when the SNPs’ number reached to 2 500,there was no significant difference between relationship coefficients estimated using 2 500 SNPs and all SNPs,and the relationship coefficients were above 0.89 between them.Furthermore,the SNPs in the same interval with different allele frequency had no significant impact on the results.It was concluded that when the number of selected SNPs reached more than 2 500,a relatively higher estimation accuracy could be obtained.Our work has built a theoretical basis for further study of the kinship coefficient with high density SNP and provides a new clue for analyzing individual kinship relationship in Simmental cattle.

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