Header

UZH-Logo

Maintenance Infos

Breeding for durable resistance against biotrophic fungal pathogens using transgenes from wheat


Camenzind, Marcela; Koller, Teresa; Armbruster, Cygni; Jung, Esther; Brunner, Susanne; Herren, Gerhard; Keller, Beat (2024). Breeding for durable resistance against biotrophic fungal pathogens using transgenes from wheat. Molecular Breeding, 44(2):8.

Abstract

Breeding for resistant crops is a sustainable way to control disease and relies on the introduction of novel resistance genes. Here, we tested three strategies on how to use transgenes from wheat to achieve durable resistance against fungal pathogens in the field. First, we tested the highly effective, overexpressed single transgene Pm3e in the background of spring wheat cultivar Bobwhite in a long-term field trial over many years. Together with previous results, this revealed that transgenic wheat line Pm3e#2 conferred complete powdery mildew resistance during a total of nine field seasons without a negative impact on yield. Furthermore, overexpressed Pm3e provided resistance to powdery mildew isolates from our worldwide collection when crossed into the elite wheat cultivar Fiorina. Second, we pyramided the four overexpressed transgenes Pm3a, Pm3b, Pm3d, and Pm3f in the background of cultivar Bobwhite and showed that the pyramided line Pm3a,b,d,f was completely resistant to powdery mildew in five field seasons. Third, we performed field trials with three barley lines expressing adult plant resistance gene Lr34 from wheat during three field seasons. Line GLP8 expressed Lr34 under control of the pathogen-inducible Hv-Ger4c promoter and provided partial barley powdery mildew and leaf rust resistance in the field with small, negative effects on yield components which might need compensatory breeding. Overall, our study demonstrates and discusses three successful strategies for achieving fungal disease resistance of wheat and barley in the field using transgenes from wheat. These strategies might confer long-term resistance if applied in a sustainable way.

SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at 10.1007/s11032-024-01451-2.

Abstract

Breeding for resistant crops is a sustainable way to control disease and relies on the introduction of novel resistance genes. Here, we tested three strategies on how to use transgenes from wheat to achieve durable resistance against fungal pathogens in the field. First, we tested the highly effective, overexpressed single transgene Pm3e in the background of spring wheat cultivar Bobwhite in a long-term field trial over many years. Together with previous results, this revealed that transgenic wheat line Pm3e#2 conferred complete powdery mildew resistance during a total of nine field seasons without a negative impact on yield. Furthermore, overexpressed Pm3e provided resistance to powdery mildew isolates from our worldwide collection when crossed into the elite wheat cultivar Fiorina. Second, we pyramided the four overexpressed transgenes Pm3a, Pm3b, Pm3d, and Pm3f in the background of cultivar Bobwhite and showed that the pyramided line Pm3a,b,d,f was completely resistant to powdery mildew in five field seasons. Third, we performed field trials with three barley lines expressing adult plant resistance gene Lr34 from wheat during three field seasons. Line GLP8 expressed Lr34 under control of the pathogen-inducible Hv-Ger4c promoter and provided partial barley powdery mildew and leaf rust resistance in the field with small, negative effects on yield components which might need compensatory breeding. Overall, our study demonstrates and discusses three successful strategies for achieving fungal disease resistance of wheat and barley in the field using transgenes from wheat. These strategies might confer long-term resistance if applied in a sustainable way.

SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at 10.1007/s11032-024-01451-2.

Statistics

Citations

Altmetrics

Downloads

7 downloads since deposited on 20 Feb 2024
7 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, not_refereed, original work
Communities & Collections:07 Faculty of Science > Department of Plant and Microbial Biology
07 Faculty of Science > Zurich-Basel Plant Science Center
Dewey Decimal Classification:580 Plants (Botany)
Scopus Subject Areas:Life Sciences > Biotechnology
Life Sciences > Molecular Biology
Life Sciences > Genetics
Life Sciences > Agronomy and Crop Science
Life Sciences > Plant Science
Language:English
Date:1 February 2024
Deposited On:20 Feb 2024 11:15
Last Modified:31 May 2024 01:56
Publisher:Springer
ISSN:1380-3743
OA Status:Hybrid
Publisher DOI:https://doi.org/10.1007/s11032-024-01451-2
PubMed ID:38263979
  • Content: Published Version
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)