Fig. 1. Development of lines or populations utilized for identification of markers linked to blue mold resistance. Three cycles of doubled haploid breeding were used to develop burley tobacco germplasm possessing blue mold resistance derived from Ovens 62. Selected Cycle 1 and Cycle 2 DH lines were used to generate the second and third cycles, respectively. NC-BMR 42 and NC-BMR 90 were Cycle 1 selections released as germplasm lines by the North Carolina Agricultural Research Service. NC-BMR 113 and NC-BMR 114 were Cycle 2 selections that were also released as germplasm lines.