Registration of High‐Yielding Exotically Derived Soybean Germplasm Line LG03‐4561‐14

Abstract

The release of soybean [Glycine max (L.) Merr.] germplasm line LG03‐4561‐14 (Reg. No. GP‐434, PI 689003) is part of an effort to expand the current narrow genetic base of the US soybean breeding pool by incorporating new genetic diversity from exotic sources. LG03‐4561‐14 is a high‐yielding, conventional, late maturity group III germplasm line that brings in new genetic diversity for potentially increasing seed yield. LG03‐4561‐14 was developed and released by the USDA‐ARS, Stoneville, MS. LG03‐4561‐14 was derived from FC 04007B, PI 68508, and PI 445837 and has 25% exotic parentage. In 4 yr of testing in the Southern Uniform Tests, LG03‐4561‐14 (3168 kg ha−1) was equivalent in yield to the high‐yielding commercial cultivars ‘AG3803’ (3190 kg ha−1) and ‘AG3934’ (3214 kg ha−1). In the early production system of the mid‐southern United States, the seed yields across 5 yr at Stoneville of LG03‐4561‐14 (4242 kg ha−1), AG3803 (4659 kg ha−1), and AG3934 (4788 kg ha−1) were not significantly different. LG03‐4561‐14 is resistant to southern stem canker and frogeye leaf spot but susceptible to charcoal rot and Phomopsis seed decay. LG03‐4561‐14 will be a valuable source of new genetic diversity for soybean breeding programs in both the public and private sectors.