The USDA Soybean Germplasm Collection contains over 21,000 accessions including wild relatives, landraces, and cultivars from around the world. The majority of unimproved accessions come from China, where soybean was domesticated, as well as Japan and Korea, other areas of ancient cultivation. Domestication resulted in a loss of genetic diversity, with landraces retaining only about 63% of the diversity found in the wild Glycine soja (Hyten et al., 2006). Furthermore, 86% of the parentage of US commercial soybean cultivars released between 1947 and 1988 is accounted for by only 17 ancestral PI accessions (Gizlice et al., 1994). Because it is limited, we need to more effectively use the available...
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#50k snp, #association mapping, #breeding & genetics, #exotic germplasm, #genetic gain, #genomic prediction, #sampling, #yield