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ARS Home » Research » Publications at this Location » Publication #65344
Title: THE EFFECT OF RBS2 ON YIELD OF SOYBEAN

Author
item BACHMAN, MICHAEL - UNIV OF ILLINOIS
item NICKELL, CECIL - UNIV OF ILLINOIS
item STEPHENS, PAUL - PIONEER HI-BRED INTL
item NICKELL, ANDREW - ASGROW SEED COMPANY
item Gray, Lynn

Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/21/1996
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Brown stem rot, caused by Phialophora gregata, is a vascular/foliar soybean disease of the north central United States. Although yield comparisons have been made between susceptible and resistant lines at infested and noninfested sites, none have evaluated the advantage associated with resistance. In this study, five pairs of near-isogeneic lines for the Rbs2 resistance gene were grown at six locations in Illinois in 1994, relying on natural infection of the disease. Lines were evaluated for disease incidence (% of infected plants) and severity (degree of infection) in late August and harvested in September. At four locations with greater than 20% incidence of brown stem rot, a 10.1% yield advantage was associated with the Rbs2 resistance gene. At two locations with less than 2% incidence of brown stem rot, a 1.5% yield advantage was associated with the Rbs2 resistance gene.