The soybean GmSNAP18 gene underlies two types of resistance to soybean cyst nematode

Shiming Liu, Pramod K. Kandoth, Naoufal Lakhssassi, Jingwen Kang, Vincent Colantonio, Robert Heinz, Greg Yeckel, Zhou Zhou, Sadia Bekal, Johannes Dapprich, Bjorn Rotter, Silvia Cianzio, Melissa G. Mitchum and Khalid Meksem ()
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Shiming Liu: Soil and Agricultural Systems, Southern Illinois University
Pramod K. Kandoth: University of Missouri
Naoufal Lakhssassi: Soil and Agricultural Systems, Southern Illinois University
Jingwen Kang: University of Missouri
Vincent Colantonio: Soil and Agricultural Systems, Southern Illinois University
Robert Heinz: University of Missouri
Greg Yeckel: University of Missouri
Zhou Zhou: Soil and Agricultural Systems, Southern Illinois University
Sadia Bekal: Soil and Agricultural Systems, Southern Illinois University
Johannes Dapprich: Generation Biotech
Bjorn Rotter: GenXPro-GmbH
Silvia Cianzio: Iowa State University
Melissa G. Mitchum: University of Missouri
Khalid Meksem: Soil and Agricultural Systems, Southern Illinois University

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract Two types of resistant soybean (Glycine max (L.) Merr.) sources are widely used against soybean cyst nematode (SCN, Heterodera glycines Ichinohe). These include Peking-type soybean, whose resistance requires both the rhg1-a and Rhg4 alleles, and PI 88788-type soybean, whose resistance requires only the rhg1-b allele. Multiple copy number of PI 88788-type GmSNAP18, GmAAT, and GmWI12 in one genomic segment simultaneously contribute to rhg1-b resistance. Using an integrated set of genetic and genomic approaches, we demonstrate that the rhg1-a Peking-type GmSNAP18 is sufficient for resistance to SCN in combination with Rhg4. The two SNAPs (soluble NSF attachment proteins) differ by only five amino acids. Our findings suggest that Peking-type GmSNAP18 is performing a different role in SCN resistance than PI 88788-type GmSNAP18. As such, this is an example of a pathogen resistance gene that has evolved to underlie two types of resistance, yet ensure the same function within a single plant species.

Date: 2017
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DOI: 10.1038/ncomms14822

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