Project Details:

Enhanced Pest Control Systems for Mid-South Soybean Production (1620-732-7237)

Parent Project: This is the first year of this project.
Checkoff Organization:United Soybean Board
Categories:Insects and pests, Soybean diseases, Breeding & genetics
Organization Project Code:1620-732-7237
Project Year:2016
Lead Principal Investigator:Paul Trey Price (Macon Ridge Research Station, Louisiana State University)
Co-Principal Investigators:
Tom W Allen (Mississippi State University)
Travis Faske (University of Arkansas)
Terry Spurlock (University of Arkansas)
Pengyin Chen (University of Missouri)
Grover Shannon (University of Missouri)
Heather Kelly (University of Tennessee-Institute of Agriculture)
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Keywords: Mid-south, frogeye leaf spot, Cercospora leaf blight, foliar, stink bug, Septoria, rust, Rhizoctonia

Contributing Organizations

Funding Institutions

Information and Results

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Project Summary

The overriding milestone target is to identify and develop genetic resistant sources and varieties that benefit producers on the farm that experience yield loss due to major diseases in the Mid-South such as Cercsopora leaf blight, aerial blight, or frogeye leaf spot or losses by any of the stink bug species. Soybean producers in the midsouthern U. S. may be adversely affected by a number of pests in any given year. This is largely due to warm and humid climatic conditions that create a unique environment favorable for many disease and insect pests. These pests include but are not limited to: frogeye leaf spot, Cercospora leaf blight, brown spot, anthracnose, charcoal rot, and a stinkbug complex that cause significant losses annually. Also, the mid-south is unique in that the area serves as a “warning system” for potential problems (ex. Soybean Rust) for other major soybean producing areas in the United States.

The most practical and economical way to manage soybean pests is with resistant varieties, if available, and the primary goal of this project is to identify sources of resistance to disease and insect pests common to the region. In the short term, this project will focus on evaluating a core group of soybean varieties along with plant introductions and other breeding material for resistance to diseases and insect pests. This core group of varieties and breeding material will also aid in defining the scope and distribution of diseases and insect pests that are on the rise in frequency and that could become a larger problem in the future. Longer term goals are to develop new varieties adapted to the midsouthern region that have resistance to economically important diseases and insect pests, while maintaining or surpassing current yield and quality requirements.

Project Objectives

This is a three-year project with annual evaluations. The investigators should be able to demonstrate “proof of concept” in three years. In the first three years, disease and insect resistant varieties and breeding material should be identified. Breeders involved in the project will focus on completing longer term objectives if the project is selected for continuation after three years. Other entomologists in participating states will be invited to participate as more stinkbug resistant material becomes available. Efforts will be made to communicate and cooperate with other soybean breeding programs (e. g. Agricultural Research Service – Stoneville, MS) to prevent redundancy and improve project efficiency. The participants will also communicate and collaborate with others involved in projects addressing related issues (e. g. USB Foliar Project – SIU).

Project Deliverables

Useful information concerning varietal resistance to multiple diseases will be generated for utilization by producers. An annual report detailing results from the regional uniform variety trial will be provided in a timely manner to stakeholders in each state through a variety of media to aid in planting decisions (extension bulletins, newsletters, email, blogs, professional meetings, field days, cross-referenced variety selection tool on individual states’ websites, etc…).

In the short term, important disease resistance data will be generated for new plant introductions (breeding stock) and selections to serve as a guide for breeder selections and longer term goals.

Breeding efforts are expected to identify resistance to Cercospora leaf blight in the short term. Identification of QTL/markers for CLB and FLS and the development and release of high yielding germplasm lines /cultivars resistant to CLB and FLS are expected in the long term.

The key outcome will be high yielding, locally adapted soybean cultivars that are resistant to both stink bugs and diseases. In addition, a set of germplasm will be created to easily incorporate resistance into new cultivars.

Once resistance has been identified, our future approach will be to identify and map markers contributing to stink bug resistance and to use marker assisted selection (MAS) to pyramid beneficial genes into current cultivars. By using MAS, it is possible to quickly screen large quantities of plant materials and remove progeny lacking the marker prior to testing for phenotypic response.

The benefits of using stink bug resistant varieties will be promoted directly to growers during field days and on-farm demonstrations. Results and pertinent project updates will be reported to the entire mid-south soybean industry in appropriate participating statewide media. For example, in Louisiana it would be the Louisiana Agriculture Magazine, the official publication of the Louisiana State University AgCenter; the Louisiana Soybean & Feed Grain Review, and at commodity and professional meetings, e.g., Louisiana Soybean and Grain Research and Promotion Board Annual Meeting, and the annual branch and national meetings of the Entomological Society of America.

Progress of Work

Final Project Results

Benefit to Soybean Farmers

The results obtained from these efforts will directly benefit soybean producers in all states where stink bugs and these diseases are yield limiting pests. The benefits from these extensive research efforts will certainly impact the southern region states, but will ultimately impact the entire soybean industry.

Performance Metrics

The principal KPI is to identify sources of genetic resistance to the major foliar diseases of soybean in the Mid- South and also for the most damaging of stink bug species. The first prime target will be soybean breeders that utilize these sources to incorporate into elite high yielding varieties, with the ultimate target the producers that prevent yield losses due to these diseases and pests.

Specific KPIs across a 3-year time span:

1. A regional variety trial will be conducted, using core commercial varieties and plant introductions, where natural disease reactions will be recorded and compiled in an annual publication that is made available for inclusion in each state’s SVT publication or similar venue.
2. Consistency of disease reactions among locations will be compared and promising plant introductions and selections will be considered for breeding stock.
3. Resistance to Cercospora leaf blight should be identified and initial crosses for CLB and FLS resistance made by the end of summer 2016.
4. Development of reciprocal inbred lines (RIL) for mapping CLB and FLS resistance and selection within

advanced breeding populations for resistance is expected by the end of 2017.
5. Identification of QTL/markers for CLB and FLS resistance and evaluation of select breeding lines for resistance is expected by the end of 2018.
6. Confirmation of QTL/markers for CLB and FLS resistance and evaluation of breeding lines for resistance and yield is expected in 2019.
7. Release of high yielding lines with CLB and FLS resistance is expected in 2020.
8. By the end of the 2016 growing season, the first screening of stink bug resistant crosses will be conducted and preliminary data used to direct future crosses.
9. By the end of the 2016 growing season, preliminary mechanisms of resistance to stink bugs will be identified.
10. By the end of 2018 growing season, soybean producers, breeders and consultants in the Mid-South should have a select list of top performing advanced soybean selections which have a significant level of resistance to stink bugs and are appropriate for each state’s growing conditions.
11. By the end of the 2018 growing season, specific mechanisms of resistance to stink bugs will be identified.
12. Quarterly reports will be provided to the USB to document the progress of the project.

Project Years