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Genome-Wide Association Analysis and Genomic Prediction for Adult-Plant Resistance to Septoria Tritici Blotch and Powdery Mildew in Winter Wheat

Abebe, Admas Alemu and Brazauskas, Gintaras and Gaikpa, David and Henriksson, Tina and Islamov, Bulat and Nistrup Jørgensen, Lise and Koppel, Mati and Koppel, Reine and Liatukas, Žilvinas and Svensson, Jan T. and Chawade, Aakash (2021). Genome-Wide Association Analysis and Genomic Prediction for Adult-Plant Resistance to Septoria Tritici Blotch and Powdery Mildew in Winter Wheat. Frontiers in Genetics. 12 , 661742
[Research article]

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Abstract

Septoria tritici blotch (STB) caused by the fungal pathogen Zymoseptoria tritici and powdery mildew (PM) caused by Blumeria graminis f.sp tritici (Bgt) are among the forefront foliar diseases of wheat that lead to a significant loss of grain yield and quality. Resistance breeding aimed at developing varieties with inherent resistance to STB and PM diseases has been the most sustainable and environment-friendly approach. In this study, 175 winter wheat landraces and historical cultivars originated from the Nordic region were evaluated for adult-plant resistance (APR) to STB and PM in Denmark, Estonia, Lithuania, and Sweden. Genome-wide association study (GWAS) and genomic prediction (GP) were performed based on the adult-plant response to STB and PM in field conditions using 7,401 single-nucleotide polymorphism (SNP) markers generated by 20K SNP chip. Genotype-by-environment interaction was significant for both disease scores. GWAS detected stable and environment-specific quantitative trait locis (QTLs) on chromosomes 1A, 1B, 1D, 2B, 3B, 4A, 5A, 6A, and 6B for STB and 2A, 2D, 3A, 4B, 5A, 6B, 7A, and 7B for PM adult-plant disease resistance. GP accuracy was improved when assisted with QTL from GWAS as a fixed effect. The GWAS-assisted GP accuracy ranged within 0.53-0.75 and 0.36-0.83 for STB and PM, respectively, across the tested environments. This study highlights that landraces and historical cultivars are a valuable source of APR to STB and PM. Such germplasm could be used to identify and introgress novel resistance genes to modern breeding lines.

Authors/Creators:Abebe, Admas Alemu and Brazauskas, Gintaras and Gaikpa, David and Henriksson, Tina and Islamov, Bulat and Nistrup Jørgensen, Lise and Koppel, Mati and Koppel, Reine and Liatukas, Žilvinas and Svensson, Jan T. and Chawade, Aakash
Title:Genome-Wide Association Analysis and Genomic Prediction for Adult-Plant Resistance to Septoria Tritici Blotch and Powdery Mildew in Winter Wheat
Series Name/Journal:Frontiers in Genetics
Year of publishing :2021
Volume:12
Article number:661742
Number of Pages:15
Publisher:FRONTIERS MEDIA SA
ISSN:1664-8021
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:wheat, Septoria tritici blotch, powdery mildew, GWAS, genomic prediction, genebank
URN:NBN:urn:nbn:se:slu:epsilon-p-112236
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-112236
Additional ID:
Type of IDID
DOI10.3389/fgene.2021.661742
Web of Science (WoS)000654229500001
ID Code:24506
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:11 Jun 2021 04:03
Metadata Last Modified:11 Jun 2021 05:01

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