TY - JOUR
T1 - Multi-stage resistance to Zymoseptoria tritici revealed by GWAS in an Australian bread wheat diversity panel
AU - Yang, Nannan
AU - Ovenden, Ben
AU - Baxter, Brad
AU - McDonald, Megan C.
AU - Solomon, Peter S.
AU - Milgate, Andrew
N1 - Publisher Copyright:
Copyright © 2022 Yang, Ovenden, Baxter, McDonald, Solomon and Milgate.
PY - 2022/10/24
Y1 - 2022/10/24
N2 - Septoria tritici blotch (STB) has been ranked the third most important wheat disease in the world, threatening a large area of wheat production. Although major genes play an important role in the protection against Zymoseptoria tritici infection, the lifespan of their resistance unfortunately is very short in modern wheat production systems. Combinations of quantitative resistance with minor effects, therefore, are believed to have prolonged and more durable resistance to Z. tritici. In this study, new quantitative trait loci (QTLs) were identified that are responsible for seedling-stage resistance and adult-plant stage resistance (APR). More importantly was the characterisation of a previously unidentified QTL that can provide resistance during different stages of plant growth or multi-stage resistance (MSR). At the seedling stage, we discovered a new isolate-specific QTL, QSt.wai.1A.1. At the adult-plant stage, the new QTL QStb.wai.6A.2 provided stable and consistent APR in multiple sites and years, while the QTL QStb.wai.7A.2 was highlighted to have MSR. The stacking of multiple favourable MSR alleles was found to improve resistance to Z. tritici by up to 40%.
AB - Septoria tritici blotch (STB) has been ranked the third most important wheat disease in the world, threatening a large area of wheat production. Although major genes play an important role in the protection against Zymoseptoria tritici infection, the lifespan of their resistance unfortunately is very short in modern wheat production systems. Combinations of quantitative resistance with minor effects, therefore, are believed to have prolonged and more durable resistance to Z. tritici. In this study, new quantitative trait loci (QTLs) were identified that are responsible for seedling-stage resistance and adult-plant stage resistance (APR). More importantly was the characterisation of a previously unidentified QTL that can provide resistance during different stages of plant growth or multi-stage resistance (MSR). At the seedling stage, we discovered a new isolate-specific QTL, QSt.wai.1A.1. At the adult-plant stage, the new QTL QStb.wai.6A.2 provided stable and consistent APR in multiple sites and years, while the QTL QStb.wai.7A.2 was highlighted to have MSR. The stacking of multiple favourable MSR alleles was found to improve resistance to Z. tritici by up to 40%.
KW - QTL
KW - Zymoseptoria tritici
KW - adult plant resistance
KW - bread wheat
KW - genome-wide association studies (GWAS)
KW - multi-stage resistance (MSR)
UR - http://www.scopus.com/inward/record.url?scp=85141345207&partnerID=8YFLogxK
U2 - 10.3389/fpls.2022.990915
DO - 10.3389/fpls.2022.990915
M3 - Article
SN - 1664-462X
VL - 13
JO - Frontiers in Plant Science
JF - Frontiers in Plant Science
M1 - 990915
ER -