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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #268335
Title: Reaction of maturity group V soybean lines to purple seed stains in Mississippi 2010

Author
item Li, Shuxian
item SCIUMBATO, GABE - Mississippi State University

Submitted to: Plant Disease Management Reports
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/5/2011
Publication Date: 8/12/2011
Citation: Li, S., Sciumbato, G. 2011. Reaction of maturity group V soybean lines to purple seed stains in Mississippi 2010. Plant Disease Management Reports. doi:10.1094/PDMR05:FC122.

Interpretive Summary: In 2009, soybean purple seed stain (PSS) caused 6.4 million bushels of yield losses in 16 southern states. This disease severely reduces seed market grade and affects seed germination and vigor. To identify new sources of resistance to purple seed stain, 14 maturity group V soybean lines were field screened by natural infection and planted at Stoneville, MS on 25 May 2010. Seeds from each plot were tested for percent purple seed stain infection. Soybean lines PI 407749 and PI 381659 were among the lines with lowest percentages of seed infection, while PI 417098 had the highest percentage of seed infection. Of 14 lines tested, four lines had less than 5% of seed infection. These soybean lines may be used to reduce loss to this disease.

Technical Abstract: In 2009, soybean purple seed stain (PSS) caused 6.4 million bushels of yield losses in 16 southern states. This disease severely reduces seed market grade and affects seed germination and vigor. PSS is caused by Cercospora kikuchii and is an economy important disease. To identify new sources of resistance to PSS, 14 maturity group V soybean lines were field screened by natural infection and planted at Stoneville, MS on 25 May, 2010. The experimental design was a randomized complete block with four replications. Seeds were harvested from each plot when the plants were mature. Seeds from each plot were tested for percent seed infection by C. kikuchii. Significant differences (P = 0.05) in seed infection by C. kikuchii were observed among soybean lines with range of 2.5% to 17.5%. Soybean lines PI 407749 and PI 381659 were among the lines with lowest percentages of seed infection, while PI 417098 had the highest percentage of seed infection. Of 14 lines tested, four lines had less than 5% of seed infection. These results will be confirmed in a replicated field trial in 2011.