ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (7): 1181-1190.doi: 10.11843/j.issn.0366-6964.2017.07.002

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A Genome-wide Association Study of Different Size Populations Based on Tail Analysis

WU Qun-qing1,2, ZHANG Long-chao2, HUANG Sheng-qiang1,3*, WANG Li-xian2*   

  1. 1. College of Animal Science and Technology, Hunan Agricultural University, Changsha 410128, China;
    2. Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    3. Hunan Co-innovation Center of Animal Production Safety, Changsha 410128, China
  • Received:2016-12-12 Online:2017-07-23 Published:2017-07-23

Abstract:

Tail analysis and genome-wide association studies(GWAS) were combined in this study to determine preliminary two tails selection criterions. A total of 2 000, 1 500, 1 000 and 500 samples and 20%, 15%, 12%, 10%, 8%, 5% of two tails were used to run GWAS to estimate the effects of the population size on GWAS and the effect of the proportion of two tails on GWAS, respectively. The results showed that the number of significant SNPs decreased with the reducing population size and the proportion of two tails. The preliminary selection criterions were:traits with heritability of about 0.38, the proportion of two tails of 8%, 10%, 10% and 20% from 2 000, 1 500, 1 000 and 500 samples, which were appropriate for two tails population for running GWAS, respectively. Further, the traits with heritability of about 0.50, the proportion of two tails of 5%, 5%, 10% and 15% from 2 000, 1 500, 1 000 and 500 samples were appropriate for two tails population for running GWAS, respectively. The present preliminary two tails selection criterions from populations with various sizes to run GWAS could detect significant SNPs effectively and also provide a strategy of reducing the cost of GWAS.

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