Evaluation of the Potential for Genomic Selection to Improve Spring Wheat Resistance to Fusarium Head Blight in the Pacific Northwest

Frontiers in Plant Science
Haixiao DongJianli Chen

Abstract

Fusarium Head Blight (FHB) has emerged in spring wheat production in Pacific Northwest during the last decade due to factors including climate changes, crop rotations, and tillage practices. A breeding population with 170 spring wheat lines was established and screened over a 2-year period in multiple locations for FHB incidence (INC), severity (SEV), and deposition of the mycotoxin, deoxynivalenol (DON). A genome-wide association study suggested that the detectable number of genetic loci and effects are limited for marker-assisted selection. In conjunction with the success of breeding on FHB resistance in other programs, genomic selection (GS) was suggested as a better option. To evaluate the prediction accuracy of GS in the current breeding population, we conducted a variety of validations by varying proportions of testing populations and cohorts based on both FHB resistance and market class, including soft white spring (SWS), hard white spring (HWS), and hard red spring (HRS). We found that INC had higher heritability, higher correlation across years and locations, and higher prediction accuracy than SEV and DON. Prediction accuracy varied among the scenarios that restricted the testing population to a certain cohort. For a ...Continue Reading

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Citations

Jan 24, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Awais Rasheed, Xianchun Xia
Jan 5, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhengqiang MaYang Yuan
Jan 19, 2019·International Journal of Molecular Sciences·Liqiang HeFrank M You
Aug 21, 2020·G3 : Genes - Genomes - Genetics·Zhenhai CuiZhiwu Zhang
Jun 13, 2021·Scientific Reports·Chengzheng YuMadhu Khanna
Sep 8, 2021·Frontiers in Plant Science·Harsimardeep S GillSunish K Sehgal

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Methods Mentioned

BETA
array technology
genotyping

Software Mentioned

R package “ lme4
CIMMYT
R package “
R package “ lme4 ”
R package “ psych
R
GAPIT
rrBLUP
Triticeae Toolbox ( T3 )
CAP

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