Project Details:

How does Phytophthora sojae evade detection by Rps genes in soybean

Parent Project: How does Phytophthora sojae evade detection by Rps genes in soybean
Checkoff Organization:Iowa Soybean Association
Categories:Soybean diseases, Breeding & genetics
Organization Project Code:
Project Year:2012
Lead Principal Investigator:Alison Robertson (Iowa State University)
Co-Principal Investigators:
Anne Dorrance (The Ohio State University)
Keywords: Phytophtora Root Rot, Phytophtora sojae

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Information and Results

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Project Summary

Phytophthora root rot is primarily managed by planting varieties with genes that confer resistance. Fourteen Rps genes have been identified and four genes are currently used in commercial soybean varieties to provide resistance to the disease. The effectiveness of a resistance gene relies on its ability to recognize the pathogen's corresponding avirulence gene. The goal of this project is to characterize the genetic changes that occur within the avirulence gene(s) of P. sojae that enable the pathogen to escape detection by the corresponding resistance gene.

Project Objectives

1. Assess the genetic diversity of avirulence genes Avr1a, Avra3a, Avr3c in populations of P. sojae from Iowa, Missouri, Ohio and South Dakota.
2. Evaluate if transposons contribute to diversity and activity in the P. sojae.
3. Develop specific primers that could monitor key Avr loci in isolates of P. sojae for monitoring of pathogen shifts.
4. Assess the prevalence of the proposed ?elite"" effector genes within the Midwest population of P. sojae.

Project Deliverables

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Final Project Results

Benefit to Soybean Farmers

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