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A CNL protein in wild emmer wheat confers powdery mildew resistance
- Source :
- The New phytologistReferences. 228(3)
- Publication Year :
- 2019
-
Abstract
- Powdery mildew, a fungal disease caused by Blumeria graminis f. sp. tritici (Bgt), has a serious impact on wheat production. Loss of resistance in cultivars prompts a continuing search for new sources of resistance. Wild emmer wheat (Triticum turgidum ssp. dicoccoides, WEW), the progenitor of both modern tetraploid and hexaploid wheats, harbors many powdery mildew resistance genes. We report here the positional cloning and functional characterization of Pm41, a powdery mildew resistance gene derived from WEW, which encodes a coiled-coil, nucleotide-binding site and leucine-rich repeat protein (CNL). Mutagenesis and stable genetic transformation confirmed the function of Pm41 against Bgt infection in wheat. We demonstrated that Pm41 was present at a very low frequency (1.81%) only in southern WEW populations. It was absent in other WEW populations, domesticated emmer, durum, and common wheat, suggesting that the ancestral Pm41 was restricted to its place of origin and was not incorporated into domesticated wheat. Our findings emphasize the importance of conservation and exploitation of the primary WEW gene pool, as a valuable resource for discovery of resistance genes for improvement of modern wheat cultivars.
- Subjects :
- 0106 biological sciences
0301 basic medicine
Genetics
Positional cloning
biology
Physiology
food and beverages
Blumeria graminis
Plant Science
biology.organism_classification
Genes, Plant
01 natural sciences
03 medical and health sciences
030104 developmental biology
Ascomycota
Cultivar
Gene pool
Common wheat
Domestication
Gene
Powdery mildew
Triticum
010606 plant biology & botany
Disease Resistance
Plant Diseases
Subjects
Details
- ISSN :
- 14698137
- Volume :
- 228
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- The New phytologistReferences
- Accession number :
- edsair.doi.dedup.....18eb6a652dd660821331cdbf4950f576