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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #317647
Title: New soybean accessions identified with resistance to Heterodera glycines populations

Author
item Arelli, Prakash
item Mengistu, Alemu
item Nelson, Randall
item CIANZIO, SILVIA - Iowa State University
item VUONG, TRI - University Of Missouri
item LI, ZENGLU - University Of Georgia

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/28/2015
Publication Date: 8/25/2015
Citation: Arelli, P.R., Mengistu, A., Nelson, R.L., Cianzio, S.R., Vuong, T., Li, Z. 2015. New soybean accessions identified with resistance to Heterodera glycines populations. ASA-CSSA-SSSA Annual Meeting Abstracts. Page 207.

Interpretive Summary:

Technical Abstract: Soybean Cyst Nematode (SCN, Heterodera glycines Ichinohe) is a serious root-parasite of soybean [Glycine max (L.) Merr.], in USA and worldwide. Annual yield losses in USA are estimated to be nearly $1 billion. These losses have remained stable at current levels with the use of resistant cultivars but over time nematode populations will adapt to deployed resistance alleles. Currently available resistant cultivars use primarily three or four sources of resistance, and several resistance genes are common among them. It is important to identify new accessions with resistance as the first step to finding new alleles to provide more durable resistance. We continue to bioassay newly available accessions in the USDA Soybean Germplasm Collection to identify additional sources of resistance. We have standardized methods for bioassays in the greenhouse and developed near homogeneous nematode populations for stable reactions on soybean plants. We bioassayed one-hundred new accessions (from PI 567706B to PI 567775A) together with seven indicator lines for reaction to HG Type 0 nematode population (commonly known as Race 3). Fifty-two lines were identified either with resistance or moderate resistance reaction based on the Female Index. Resistance was confirmed in multiple replicated tests. Data were combined for the tests for ANOVA of female indices by the Statistical Analysis System Software, and means were separated with Fisher’s LSD based on significant F test. We discuss these results.