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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Genetics Research » Research » Publications at this Location » Publication #330375
Title: Soybean Pl 494182: A new source of more durable resistance to nematode populations

Author
item Arelli, Prakash
item Mengistu, Alemu
item WANG, DECHUN - Michigan State University
item CIANZIO, SILVIA - Iowa State University
item LI, ZENGLU - University Of Georgia
item Fritz, Lisa

Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 7/11/2017
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Soybean cyst nematode (SCN; Heterodera glycines Ichinohe) is the most pervasive pest of soybean [Glycine max (L.) Merr.] in the United States and worldwide. In 2012, SCN reduced yields in the U.S. by an estimated $1 billion. These losses have been contained at a stable level with the use of resistant cultivars, but over time, genetically heterogeneous nematode populations will continue to evolve and adapt to deployed resistance alleles. New resistance sources are desired to develop new cultivars for more durable resistance. PI 494182 is a recent yellow-seeded introduction from Japan and is resistant to HG Types 0 and 2.5.7. It is similar in nematode reaction to Peking, the major source of resistance in southern cultivars, but the two lines are genetically diverse from each other. In a cluster analysis, PI 494182 and Peking grouped in two different clusters. PI 494182 was crossed separately to four different susceptible soybeans: cv. Prohio, cv. 5002T, cv. Skylla, and LG05-2870-3-1 (Sel.). Segregating progenies have been developed for each of the four bi-parental crosses and advanced with concurrent single- plant-progeny and/or single-row-selections using standard breeding procedures. Initially, selections were made using SSR markers for SCN resistance in MAS. Two selections of F16 Skylla x PI 494182, three selections of F2:5:7 5002T x PI 494182, and six selections of F2:5:7 Prohio x PI 494182 will undergo on-station yield testing in 2016 followed by multi-location-yield trials. These selections have been evaluated in the greenhouse for SCN resistance using a standardized method and were found resistant to one or more HG Types. An additional 366 single-plant-selections made from these crosses in 2015 will be evaluated for uniformity and more desirable agronomic traits in 2016, along with 235 F2:3 lines of LG05-2870-3-1(Sel.) x PI 494182. Further, evaluations will continue until most desirable lines with high yield resistance to nematode populations combined with resistance to fungal pathogens are identified and released to soybean breeders. Breeders may use these releases for their breeding programs as source materials to develop resistant cultivars in different maturity groups for higher yields and will contribute for sustainable soybean production. Ultimately, soybean growers will be the beneficiaries.