Project Details:

Title:
Screening Germplasm and Breeding for Resistance to Phomopsis Seed Decay in Soybean (Year 1 of 9261)

Parent Project: This is the first year of this project.
Checkoff Organization:United Soybean Board
Categories:Breeding & genetics, Soybean diseases
Organization Project Code:9261
Project Year:2009
Lead Principal Investigator:Shuxian Li (USDA-ARS)
Co-Principal Investigators:
John Rupe (University of Arkansas)
Pengyin Chen (University of Missouri)
J Allen Wrather (University of Missouri)
Keywords:

Contributing Organizations

Funding Institutions

Information and Results

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Project Summary

This is a new proposal on screening germplasm and breeding for resistance to Phomopsis seed decay (PSD) in soybean. This disease is caused primarily by Phomopsis longicolla, and other Diaporthe, Phomopsis spp. and (Diaporthe/Phomopsis complex). Funding requested for the first stage is for three years (2009-2012). It is anticipated the work will continue for the following next three years, unraveling the interaction between soybean and fungus. Findings from the first proposal (if funded) will be the beginning point of the 2nd stage proposal that will be submitted at the completion of the first three years.

The proposal will focus on the two sides of the disease equation:
~ Screening untapped (not yet tested for PSD resistance) 123 MG 3-5 germplasm lines collected from 28 countries, and
~ Breeding lines and cultivars from Southern US with resistance to PSD. This research will provide tools and potential new resistance genes to increase breeding efficiency for high-yield PSD resistant lines.

Phomopsis seed decay of soybean is a major cause of poor quality and poor germination of soybean seeds in the United States, especially in the mid-southern US. Expectations of the proposed project will be that at the end of the first three-year period, diverse germplasm with potentially new resistance genes will be identified and the new source of resistance will be incorporated in adapted cultivars and breeding lines.

Project Objectives

1. Screen untapped (not yet tested for Phomopsis Seed Decay (PSD) resistance) 123 MG 3-5 germplasm lines collected from 28 countries.
2. Breeding lines and cultivars from Southern U.S. with resistance to PSD. This research will provide tools and potential new resistance genes to increase breeding efficiency for high-yield PSD resistant lines.

Project Deliverables

During this first period of the grant, a rapid greenhouse and laboratory screening techniques will be developed and evaluated for their correlations with the field data. The screening protocols that will be used in the greenhouse and laboratory will provide indications of which lines are resistant.

Progress of Work

Final Project Results

Benefit to Soybean Farmers

Performance Metrics

This project will be evaluated by: 1. Germplasm with PSD resistance identified 2. Cultivars and breeding lines with PSD resistance developed 3. Protocols for resistance screening developed Quantifiable measurements of disease resistance in plants, and new screening protocols will enhance breeding efforts, and increase breeding efficiency. Discovery of new resistance genes in the plant would facilitate broadening the genetic base of resistance of the soybean crop. Understanding of the PSD causing pathogen will increase breeding efficiency for resistant varieties.

Project Years