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Related Experiment Video

Updated: Oct 23, 2025

Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens

Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens

Published on: February 3, 2020

Tightly linked Rps12 and Rps13 genes provide broad-spectrum Phytophthora resistance in soybean.

Dipak K Sahoo¹, Anindya Das², Xiaoqiu Huang²

¹Department of Agronomy, Iowa State University, Ames, IA, 50011, USA.

Scientific Reports

|August 20, 2021

Summary

A new soybean gene, Rps13, provides resistance to Phytophthora sojae, complementing Rps12. This discovery offers broad-spectrum Phytophthora resistance in soybean cultivars through linked resistance genes.

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Area of Science:

Plant pathology
Genetics
Agricultural science

Background:

Phytophthora root and stem rot, caused by Phytophthora sojae, is a significant soybean disease.
Current control relies on resistant cultivars, but pathogen evolution rapidly overcomes single resistance genes.

Purpose of the Study:

To investigate the effectiveness of the Rps12 gene against Phytophthora sojae isolates.
To identify novel resistance genes and understand their interaction with Rps12.

Main Methods:

Utilized recombinant inbred lines (RILs) with recombination breakpoints in the Rps12 region.
Tested RILs against a set of P. sojae isolates to assess resistance efficacy.

Main Results:

Discovered a novel resistance gene, Rps13, tightly linked to Rps12 (4 cM genetic distance).
Rps13 confers resistance to P. sojae isolate V13, virulent to Rps12-containing lines lacking Rps13.
Two linked Rps genes (Rps12 and Rps13) provide distinct, race-specific resistance.

Conclusions:

Soybean possesses two tightly linked functional Rps genes conferring broad-spectrum Phytophthora resistance.
Identified molecular markers for incorporating this dual-gene resistance into commercial soybean cultivars.