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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #304899
Title: Evaluation of diverse soybean germplasm for resistance to Phomopsis Seed Decay

Author
item Li, Shuxian
item RUPE, JOHN - University Of Arkansas
item CHEN, PENGYIN - University Of Arkansas
item SHANNON, GROVER - University Of Arkansas
item WRATHER, ALLEN - University Of Arkansas
item Boykin, Deborah

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/12/2015
Publication Date: 11/5/2015
Citation: Li, S., Rupe, J., Chen, P., Shannon, G., Wrather, A., Boykin, D.L. 2015. Evaluation of diverse soybean germplasm for resistance to Phomopsis Seed Decay. Plant Disease. 99:1517-1525.

Interpretive Summary: Phomopsis seed decay (PSD) is a major cause of poor quality soybean seeds. To identify soybean lines with resistance to PSD, a total of 135 selected soybean lines originally from 28 countries and in maturity groups III, IV, and V along with resistant and susceptible checks were field screened by natural infection in 2009 at Arkansas, Mississippi, and Missouri. Based on assays of naturally infected seed in 2009, 42 lines including the most resistant and susceptible lines were selected and planted in 2010, 2011, and 2012 with Phomopsis inoculated and non-inoculated treatments. Five MG III (PI189891, PI 398697, PI 417361, PI 504481, and PI 88490), four MG IV (PI 158765, PI 235335, PI 346308, PI416779), and three MG V (PI 381659, PI 407749, PI 417567) had lower Phomopsis seed infection than the resistant checks averaged across locations and inoculation treatments over years. These novel sources of PSD-resistance may be useful in developing soybean breeding lines or cultivars with resistance to PSD.

Technical Abstract: Phomopsis seed decay (PSD) is a major cause of poor quality soybean seeds. The disease is caused primarily by the fungal pathogen, Phomopsis longicolla. To identify soybean lines with resistance to PSD, a total of 135 selected soybean germplasm accessions originally from 28 countries and in maturity groups III, IV, and V along with resistant and susceptible checks were field screened by natural infection in 2009 at Arkansas, Mississippi, and Missouri. Based on assays of naturally infected seed in 2009, 42 lines including the most resistant and susceptible lines were selected and planted in 2010, 2011, and 2012 with Phomopsis inoculated and non-inoculated treatments. Five MG III (PI189891, PI 398697, PI 417361, PI 504481, and PI 88490), four MG IV (PI 158765, PI 235335, PI 346308, PI416779), and three MG V (PI 381659, PI 407749, PI 417567) had lower Phomopsis seed infection than the resistant checks averaged across locations and inoculation treatments over years. These novel sources of PSD-resistance may be useful in developing soybean breeding lines or cultivars with resistance to PSD.