A genomic selection index applied to simulated and real data

Ceron-Rojas, J. Jesus, Crossa, Jose, Arief, Vivi N., Basford, Kaye, Rutkoski, Jessica, Jarquin, Diego, Alvarado, Gregorio, Beyene, Yoseph, Semagn, Kassa and DeLacy, Ian (2015) A genomic selection index applied to simulated and real data. G3: Genes, Genomes, Genetics, 5 10: 2155-2164. doi:10.1534/g3.115.019869

Author Ceron-Rojas, J. Jesus
Crossa, Jose
Arief, Vivi N.
Basford, Kaye
Rutkoski, Jessica
Jarquin, Diego
Alvarado, Gregorio
Beyene, Yoseph
Semagn, Kassa
DeLacy, Ian
Title A genomic selection index applied to simulated and real data
Journal name G3: Genes, Genomes, Genetics   Check publisher's open access policy
ISSN 2160-1836
Publication date 2015
Year available 2015
Sub-type Article (original research)
DOI 10.1534/g3.115.019869
Open Access Status DOI
Volume 5
Issue 10
Start page 2155
End page 2164
Total pages 10
Place of publication Bethesda, MD United States
Publisher Genetics Society of America
Collection year 2016
Language eng
Formatted abstract
A genomic selection index (GSI) is a linear combination of genomic estimated breeding values that uses genomic markers to predict the net genetic merit and select parents from a nonphenotyped testing population. Some authors have proposed a GSI; however, they have not used simulated or real data to validate the GSI theory and have not explained how to estimate the GSI selection response and the GSI expected genetic gain per selection cycle for the unobserved traits after the first selection cycle to obtain information about the genetic gains in each subsequent selection cycle. In this paper, we develop the theory of a GSI and apply it to two simulated and four real data sets with four traits. Also, we numerically compare its efficiency with that of the phenotypic selection index (PSI) by using the ratio of the GSI response over the PSI response, and the PSI and GSI expected genetic gain per selection cycle for observed and unobserved traits, respectively. In addition, we used the Technow inequality to compare GSI vs. PSI efficiency. Results from the simulated data were confirmed by the real data, indicating that GSI was more efficient than PSI per unit of time.
Keyword Genomic estimated breeding value
Genomic selection
Net genetic merit
Selection index
Selection response
Shared data resource
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Agriculture and Food Sciences
Official 2016 Collection
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