Genomic estimated selection criteria and parental contributions in parent selection increase genetic gain of maternal haploid inducers in maize
Journal
Theoretical and Applied Genetics
Journal Volume
137
Journal Issue
11
Pages
248
Date Issued
2024-10
Author(s)
Yu-Ru Chen
Ursula K. Frei
Thomas Lübberstedt
Abstract
Parent selection in crosses aligns well with the quantitative trait performance in the progenies. We herein take advantage of estimated genetic values (EGV) and usefulness criteria (UC) of bi-parental combinations by genomic prediction (GP) to compare the empirical performance of doubled haploid inducer (DHI) progenies of eight elite inducers crosses in a half-diallel. We used parental contribution and discovery of superiors from elite-by-historical bridging populations to enhance genetic gain for long-term selection. In this empirical study, the narrow-sense heritabilities of four traits of interest (Days to flowering, DTF; haploid induction rate, HIR; plant height, PHT; Total primary branch length, PBL) in DHI population were 0.81, 0.71, 0.45 and 0.46, respectively. The genomic estimated EGV_Mid/Mean and EGV/UC_Inferior was significantly correlated with the sample mean of progenies and inferiors in four traits in the breeding and bridging population. EGV/UC_Superior were significantly correlated with the mean of superiors in DTF, PHT, and PBL in breeding and bridging populations. The genomic estimated parent contributions in DH progenies of bridging populations enabled discovery of favorable genome region from historical inducers to improve the genetic gain of HIR for long-term selection.
SDGs
Publisher
Springer Nature
Description
The genotypic and phenotypic data used this study can be found in the following link, https://doi.org/https://doi.org/10.25380/iastate.24527653.v1. The haploid inducers used in this study can be accessed from Doubled Haploid Facility at Iowa State University.
Type
journal article