The wheat stem rust resistance gene Sr43 encodes an unusual protein kinase

Guotai Yu, Oadi Matny, Spyridon Gourdoupis, Naganand Rayapuram, Fatimah R. Aljedaani, Yan L. Wang, Thorsten Nürnberger, Ryan Johnson, Emma E. Crean, Isabel M.L. Saur, Catherine Gardener, Yajuan Yue, Ngonidzashe Kangara, Burkhard Steuernagel, Sadiye Hayta, Mark Smedley, Wendy Harwood, Mehran Patpour, Shuangye Wu, Jesse PolandJonathan D.G. Jones, T. Lynne Reuber, Moshe Ronen, Amir Sharon, Matthew N. Rouse, Steven Xu, Kateřina Holušová, Jan Bartoš, István Molnár, Miroslava Karafiátová, Heribert Hirt, Ikram Blilou, Łukasz Jaremko, Jaroslav Doležel, Brian J. Steffenson*, Brande B.H. Wulff*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


To safeguard bread wheat against pests and diseases, breeders have introduced over 200 resistance genes into its genome, thus nearly doubling the number of designated resistance genes in the wheat gene pool1. Isolating these genes facilitates their fast-tracking in breeding programs and incorporation into polygene stacks for more durable resistance. We cloned the stem rust resistance gene Sr43, which was crossed into bread wheat from the wild grass Thinopyrum elongatum 2,3. Sr43 encodes an active protein kinase fused to two domains of unknown function. The gene, which is unique to the Triticeae, appears to have arisen through a gene fusion event 6.7 to 11.6 million years ago. Transgenic expression of Sr43 in wheat conferred high levels of resistance to a wide range of isolates of the pathogen causing stem rust, highlighting the potential value of Sr43 in resistance breeding and engineering.

Original languageEnglish (US)
Pages (from-to)921-926
Number of pages6
JournalNature Genetics
Issue number6
StatePublished - Jun 2023

ASJC Scopus subject areas

  • Genetics


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