Registration of 'Guymon' Wheat

green-up, heading date, test weight, grain yield, wheat protein content, kernel hardness, and kernel size. Subsequent generations were advanced by bulk-selfi ng in the fi eld. Minimal roguing of slightly taller variants was performed each year until 2004 despite this line being F 2 -derived. With an initial frequency of 1.5% red kernels, seed from the 2003 harvest were passed through a single-kernel sorter to reduce the frequency of red kernels to < 0.3% (Engineering Research Unit, USDA-ARS-GMPRC, Manhattan, KS). From a fi nal breeder-seed increase in 2004, we detected 0.0 to 0.2% red kernels based on the NaOH-bleach test (Ram et al., 2002) of multiple samples. As of the 2006–2007 crop year, Guymon is a F 2 -derived line in the F 12 generation.