Description:
Colossus LJ traces to a single plant selection in the F4 generation in 2006 from the cross: SC98-1930 x SC00-892RR. SC98-1930 was developed from the cross F92-1792 x ‘Manokin’(PI 559932). F92-1792 was derived from a cross between PI 417479 x F87-4017. SC00-892RR is MG VI breeding line that was derived from the cross between ‘Dillon’ (PI 592756) and an RR1 donor from Monsanto. Dillon was developed from a cross between ‘Centennial’ (PI 548975) x ‘Young’ (PI 508266). The initial cross (SC98-1930 x SC00-892RR) was made in 2004 at Clemson, South Carolina. The F1 generation was grown in Puerto Rico in the winter, 2004-2005, and the F2 to F4 generations were advanced by the pod-bulk method in South Carolina and Puerto Rico, 2005 to 2006. Single plants were then selected in the F4 generation and sent to the 2006-2007 winter nursery in Puerto Rico to produce F5 seed that was used to plant preliminary yield trials in 2007. Once entering yield trials, the breeding line designation SC06-306RR was used. Plants received glyphosate applications throughout development starting with the F2 generation for evaluation of resistance to glyphosate.