An unusual tandem kinase fusion protein confers leaf rust resistance in wheat

0575377 - ÚEB 2024 RIV US eng J - Journal Article
Wang, Y. - Abrouk, M. - Gourdoupis, S. - Koo, D.H. - Karafiátová, Miroslava - Molnár, István - Holušová, Kateřina - Doležel, Jaroslav - Athiyannan, N. - Cavalet-Giorsa, E. - Jaremko, Ł. - Poland, J. - Krattinger, S.G.
An unusual tandem kinase fusion protein confers leaf rust resistance in wheat.
Nature Genetics. Roč. 55, č. 6 (2023), s. 914-920. ISSN 1061-4036. E-ISSN 1546-1718
R&D Projects: GA MŠMT(CZ) EF16_019/0000827
Institutional support: RVO:61389030
Keywords : AEGILOPS-UMBELLULATA * GENE * EXPRESSION
OECD category: Biochemistry and molecular biology
Impact factor: 30.8, year: 2022
Method of publishing: Open access
https://doi.org/10.1038/s41588-023-01401-2

The introgression of chromosome segments from wild relatives is an established strategy to enrich crop germplasm with disease-resistance genes 1. Here we use mutagenesis and transcriptome sequencing to clone the leaf rust resistance gene Lr9, which was introduced into bread wheat from the wild grass species Aegilops umbellulata 2. We established that Lr9 encodes an unusual tandem kinase fusion protein. Long-read sequencing of a wheat Lr9 introgression line and the putative Ae. umbellulata Lr9 donor enabled us to assemble the ~28.4-Mb Lr9 translocation and to identify the translocation breakpoint. We likewise cloned Lr58, which was reportedly introgressed from Aegilops triuncialis 3, but has an identical coding sequence compared to Lr9. Cytogenetic and haplotype analyses corroborate that the two genes originate from the same translocation event. Our work sheds light on the emerging role of kinase fusion proteins in wheat disease resistance, expanding the repertoire of disease-resistance genes for breeding.
Permanent Link: https://hdl.handle.net/11104/0345172