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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #242709
Title: Registration of LG04-6863 Soybean Germplasm Line with Diverse Pedigree

Author
item SHANNON, J - University Of Missouri
item Nelson, Randall
item LEE, J - University Of Missouri
item WRATHER, J - University Of Missouri

Submitted to: Journal of Plant Registrations
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/2/2010
Publication Date: 1/9/2010
Citation: Shannon, J.G., Nelson, R.L., Lee, J.D., Wrather, J.A. 2010. Registration of LG04-6863 Soybean Germplasm Line with Diverse Pedigree. Journal of Plant Registrations. 4:70-72.

Interpretive Summary: U.S. soybean varieties are derived from a very limited genetic base. Twenty-six ancestral lines contribute more than 90% of the genes to current varieties and six lines account for 60% of the genetic base. It is not known if this lack of diversity is restricting current gains in improving yield but the evidence is growing that there are yield enhancing genes in lines in the USDA Soybean Germplasm Collection that have not been used in U.S. breeding. These exotic lines have not been used extensively in variety development because they all have lower yield than U.S. cultivars and most breeding programs cannot afford to take the time to develop high yielding lines from this material. We have developed and tested a new experimental line with a pedigree of 38% exotic germplasm that is derived from four soybean introductions that are not in the pedigree of any soybean variety in the U.S. It has the same yield as a widely grown herbicide tolerant variety sold by a commercial company. This line can be used as a high-yielding, parental line in a variety development programs of both public and private institutions to broaden the genetic base and improve the yield of U.S. varieties.

Technical Abstract: Soybean [Glycine max (L.) Merr.] germplasm line LG04-6863 was developed and released by the University of Missouri Agricultural Experiment Station, Delta Center, Portageville, MO, the USDA-Agricultural Research Service and the Illinois Agricultural Experiment Station, Urbana IL. It was approved for release May 2009. LG04-6863 is an F5 plant selection composited in the F6 generation from Rend x LG97-9486. It has shown high yield potential in tests across the southern USA with 38% of its pedigree from plant introductions and unique diversity not known in soybeans adapted to southern US environments. LG04-6863 (relative maturity 4.4) has yielded, 101, 100 and 97% of yields of Asgrow AG4403(3193, 4047 and 3833 kg ha-1), a widely grown Roundup Ready cultivar of similar maturity, across eight locations in the USDA Uniform Preliminary Early Group IV Test – Southern States; eight locations in the USB Southern Early Group IV Diversity Trials; and 15 southeastern Missouri tests, respectively. It is resistant to stem canker [caused by Diaporthe phaseolorum (Cooke and Ellis) Sacc. var. meridionales F. A. Fernandez] and bacterial pustule [caused by Xanthomonas axonpodis pv. glycines (Nakano) Vauterin et al.]. Reaction to phytophthora root rot (PRR) caused by Phythphthora sojae M. J. Kaufmann & J. W. Gerdemann, is unknown but LG04-6863 has shown good performance on heavy clay soils where PRR often occurs. Soybean introductions have been underutilized in breeding programs. LG04-6863 will have use as an elite parent in soybean breeding programs to improve yield and broaden the germplasm base.