Response surface analysis of genomic prediction accuracy values using quality control covariates in soybean

Diego Jarquín, Reka Howard, George Graef, Aaron Lorenz

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

An important and broadly used tool for selection purposes and to increase yield and genetic gain in plant breeding programs is genomic prediction (GP). Genomic prediction is a technique where molecular marker information and phenotypic data are used to predict the phenotype (eg, yield) of individuals for which only marker data are available. Higher prediction accuracy can be achieved not only by using efficient models but also by using quality molecular marker and phenotypic data. The steps of a typical quality control (QC) of marker data include the elimination of markers with certain level of minor allele frequency (MAF) and missing marker values and the imputation of missing marker values. In this article, we evaluated how the prediction accuracy is influenced by the combination of 12 MAF values, 27 different percentages of missing marker values, and 2 imputation techniques (IT; naïve and Random Forest (RF)). We constructed a response surface of prediction accuracy values for the two ITs as a function of MAF and percentage of missing marker values using soybean data from the University of Nebraska–Lincoln Soybean Breeding Program. We found that both the genetic architecture of the trait and the IT affect the prediction accuracy implying that we have to be careful how we perform QC on the marker data. For the corresponding combinations MAF-percentage of missing values we observed that implementing the RF imputation increased the number of markers by 2 to 5 times than the simple naïve imputation method that is based on the mean allele dosage of the non-missing values at each loci. We conclude that there is not a unique strategy (combination of the QCs and imputation method) that outperforms the results of the others for all traits.

Original languageEnglish (US)
JournalEvolutionary Bioinformatics
Volume15
DOIs
StatePublished - 2019

Bibliographical note

Funding Information:
FUndInG: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project (or patent) is based on research that was partially supported by the Nebraska Agricultural Experiment Station with funding from the Hatch Act (Accession Number 231571) through the USDA National Institute of Food and Agriculture.

Funding Information:
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This project (or patent) is based on research that was partially supported by the Nebraska Agricultural Experiment Station with funding from the Hatch Act (Accession Number 231571) through the USDA National Institute of Food and Agriculture.

Publisher Copyright:
© The Author(s) 2019.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Genomic prediction
  • Imputation
  • Minor allele frequency
  • Missing marker score
  • Quality control
  • Random Forest
  • Response surface
  • Soybean

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