Improving accuracies of genomic predictions for drought tolerance in maize by joint modeling of additive and dominance effects in multi-environment trials

Heredity
Kaio Olímpio Das Graças DiasMaria Marta Pastina

Abstract

Breeding for drought tolerance is a challenging task that requires costly, extensive, and precise phenotyping. Genomic selection (GS) can be used to maximize selection efficiency and the genetic gains in maize (Zea mays L.) breeding programs for drought tolerance. Here, we evaluated the accuracy of genomic selection (GS) using additive (A) and additive + dominance (AD) models to predict the performance of untested maize single-cross hybrids for drought tolerance in multi-environment trials. Phenotypic data of five drought tolerance traits were measured in 308 hybrids along eight trials under water-stressed (WS) and well-watered (WW) conditions over two years and two locations in Brazil. Hybrids' genotypes were inferred based on their parents' genotypes (inbred lines) using single-nucleotide polymorphism markers obtained via genotyping-by-sequencing. GS analyses were performed using genomic best linear unbiased prediction by fitting a factor analytic (FA) multiplicative mixed model. Two cross-validation (CV) schemes were tested: CV1 and CV2. The FA framework allowed for investigating the stability of additive and dominance effects across environments, as well as the additive-by-environment and the dominance-by-environment intera...Continue Reading

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Citations

Jun 28, 2019·Journal of Animal Breeding and Genetics = Zeitschrift Für Tierzüchtung Und Züchtungsbiologie·Daniel J TolhurstBrian R Cullis
Jun 30, 2019·Genetics·Paul SchmidtHans-Peter Piepho
Nov 24, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·K O G DiasM M Pastina
Jan 8, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Colleen H HuntDavid R Jordan
May 31, 2020·Heredity·Amanda Avelar de OliveiraGabriel Rodrigues Alves Margarido
Dec 20, 2019·G3 : Genes - Genomes - Genetics·Jhonathan P R Dos SantosMichael A Gore
Nov 21, 2020·The Plant Genome·Filipe C AlvesGustavo de Los Campos
Feb 9, 2021·Frontiers in Genetics·Luis F OsorioVance M Whitaker
Apr 28, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Seema YadavKai P Voss-Fels
Aug 1, 2019·Genetics·Paul SchmidtHans-Peter Piepho
Jul 3, 2021·Plants·Talles de Oliveira SantosGabriel Moreno Bernardo Gonçalves
Oct 26, 2021·Frontiers in Plant Science·Germano Costa-NetoRoberto Fritsche-Neto

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Methods Mentioned

BETA
genotyping

Software Mentioned

MET
GBLUP
GS
NPUTE
TASSEL
R Core Team
R
ASReml
nadiv

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