Description:
S16-5503GT was developed from a cross that involved conventional cultivar S11-16653 (female), and high-yielding late MG IV soybean cultivar S11-20337RR1 (male), both developed by the University of Missouri. The female parent S11-16653 is a high-yielding early MG V soybean with broad adaptation and resistance to multiple diseases, such as soybean cyst nematode (SCN), reniform nematode (RN), stem canker (SC), phytophthora root rot (PRR), frogeye leaf spot (FLS), sudden death syndrome (SDS), and is tolerant to salinity. Cultivar S11- 16653 was derived from the cross between S07-2680 (female), a Missouri breeding line and LG04-6000 (male), an Illinois soybean line. S07-2680 is a MG V high-yielding breeding line derived from the cross S99-2281 × S02-6143. S99-2281 is a high-yielding, early MG V soybean germplasm line with broad resistance to multiple nematode species and carries the Rcs3 gene for resistance to all known races of FLS caused by Cercospora sojina K. On the other hand, LG04-6000 (male) is a high yielding MG group IV soybean germplasm line developed from exotic parents adapted to the northern United States and was released jointly by the USDA-ARS and the Illinois Agricultural Experiment Station. The male parent S11-20337RR1 was developed from the cross between cultivar S05-11482 (female) and Missouri breeding line S06-3095RR (male). S05-11482 is a University of Missouri released MG V early cultivar with resistance to SCN (races 1,2, 3, 5, 14), FLS, southern root knot (SRKN) and SDS. It is tolerant to salt toxicity and has high oil concentration (23%).