James Specht1, I. -Y. Choi2, David Hyten3, Kevin Chase4, K. Gordon Lark4, and Perry Cregan5. (1) Department of Agronomy and Horticulture, University of Nebraska-Lincoln, P. O. Box 830915, Lincoln, NE 68503, (2) Soybean Genomics & Improvement Laboratory, USDA ARS Bldg 006 Room 100, BARC-West 10300 Baltimore Avenue, Beltsville, MD 20705-2350, (3) USDA-ARS, 10300 Baltimore Ave., Bldg-006 BARC-West, Beltsville, MD 20705, (4) University of Utah, Dep. of Biology, Salt Lake City, UT 84112, (5) Soybean Genomics & Improvement Lab, USDA ARS Bldg 006 Room 100, 10300 Baltimore Avenue, Beltsville, MD 20705-2350
The last published soybean map was published online in Feb 2004 (Song et al., 2004. A new integrated genetic linkage map of the soybean. TAG 109:122-128). The primary markers in this map were RFLPs and SSRs. This 2.5-year old map is about to be updated by adding markers known as single nucleotide polymorphisms (SNPs). About a 1500 SNPs have now been mapped in four mapping populations. The gene-based SNPs distributed evenly across the 20 soybean linkage groups (LG) as would be predicted based upon LG length although a significantly larger number of genes mapped to LGs E and J. Within LGs, the gene-based SNPs were clustered as would be anticipated from previous suggestions of gene-rich vs. gene-poor regions in soybean. The status of this SNP mapping effort, including the number and location of mapped SNP numbers, will be updated in this presentation.
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