Description:
SS93-6012 and SS93-6181 (both MGIII) were developed from a cross between MO/PSD-0259 (PI 562694) (PSD-resistant MGIV cultivar) and Asgrow 3834 (PSD-susceptible MGIII cultivar) in 1990 at the Bradford Research and Extension Center (BREC), Columbia, Missouri. MO/PSD-0259 (PI 562694) is essentially a composite of 11 lines that resulted from the cross between PI 417479 x Merschman Dallas made at Columbia, MO in 1984 and was registered as PSD-resistant germplasm in 1993. The F1 and F3 generations were grown during the winters of 1990/91 and 1991-92 in Puerto Rico, respectively, while the remaining generations were grown at the BREC, Columbia, Missouri.