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Field grown transgenic Pm3e wheat lines show powdery mildew resistance and no fitness costs associated with high transgene expression


Koller, Teresa; Brunner, Susanne; Herren, Gerhard; Sanchez-Martin, Javier; Hurni, Severine; Keller, Beat (2019). Field grown transgenic Pm3e wheat lines show powdery mildew resistance and no fitness costs associated with high transgene expression. Transgenic research, 28(1):9-20.

Abstract

Pm3 from wheat encodes a nucleotide-binding leucine-rich repeat type of receptor and confers resistance to powdery mildew caused by the fungal pathogen Blumeria graminis f.sp. tritici (Bgt). Each of the 17 functional Pm3 alleles identified so far confers resistance to a distinct spectrum of Bgt isolates. Variant Pm3e has been found in wheat donor line W150 and differs only by two amino acids from the non-functional variant Pm3CS. In order to evaluate the capability of Pm3e to provide powdery mildew field resistance, we generated transgenic Pm3e lines by biolistic transformation of the powdery mildew susceptible spring wheat cultivar Bobwhite. Field trials conducted during four field seasons in Switzerland showed significant and strong powdery mildew resistance of the Pm3e transgenic lines, whereas the corresponding biological sister lines, not containing the transgene, were severely powdery mildew infected. Thus Pm3e alone is responsible for the strong resistance phenotype. The field grown transgenic lines showed high transgene expression and Pm3e protein accumulation with no fitness costs on plant development and yield associated with Pm3e abundance. Line E#1 as well as sister line E#1 showed delayed flowering due to somaclonal variation. The study shows the capability of Pm3e in providing strong powdery mildew field resistance, making its use in wheat breeding programs very promising.

Abstract

Pm3 from wheat encodes a nucleotide-binding leucine-rich repeat type of receptor and confers resistance to powdery mildew caused by the fungal pathogen Blumeria graminis f.sp. tritici (Bgt). Each of the 17 functional Pm3 alleles identified so far confers resistance to a distinct spectrum of Bgt isolates. Variant Pm3e has been found in wheat donor line W150 and differs only by two amino acids from the non-functional variant Pm3CS. In order to evaluate the capability of Pm3e to provide powdery mildew field resistance, we generated transgenic Pm3e lines by biolistic transformation of the powdery mildew susceptible spring wheat cultivar Bobwhite. Field trials conducted during four field seasons in Switzerland showed significant and strong powdery mildew resistance of the Pm3e transgenic lines, whereas the corresponding biological sister lines, not containing the transgene, were severely powdery mildew infected. Thus Pm3e alone is responsible for the strong resistance phenotype. The field grown transgenic lines showed high transgene expression and Pm3e protein accumulation with no fitness costs on plant development and yield associated with Pm3e abundance. Line E#1 as well as sister line E#1 showed delayed flowering due to somaclonal variation. The study shows the capability of Pm3e in providing strong powdery mildew field resistance, making its use in wheat breeding programs very promising.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Plant and Microbial Biology
Dewey Decimal Classification:580 Plants (Botany)
Scopus Subject Areas:Life Sciences > Biotechnology
Life Sciences > Animal Science and Zoology
Life Sciences > Agronomy and Crop Science
Life Sciences > Genetics
Uncontrolled Keywords:Biotechnology, Agronomy and Crop Science, Animal Science and Zoology, Genetics
Language:English
Date:1 February 2019
Deposited On:10 Jan 2019 11:55
Last Modified:29 Jul 2020 08:52
Publisher:Springer
ISSN:0962-8819
OA Status:Closed
Publisher DOI:https://doi.org/10.1007/s11248-018-0099-5
Project Information:
  • : FunderSNSF
  • : Grant ID310030_163260
  • : Project TitleMolecular analysis of three different types of fungal disease resistance mechanisms in cereals

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