The genes involved in F 1 seedling abnormal development and lethality in inter-gene pool crosses have been designated as Dl 1 (MesoAmerican=MA) and Dl 2 (Andean=A) (Shii et al., 1980, J. Hered. 71:218–222). The different degrees of leaf crippling (C) in segregating populations of crosses was due to the interaction between the Dl 1 or Dl 2 loci, growing environment, and the lcr allele (Singh and Molina, 1996, J. Hered., In press). The objective was to identify RAPD markers linked to the genes for crippling ( lcr ) and seedling lethality (Dl) using the bulked segregation analysis procedure for F 2 of MA × A crosses. Crosses were made between C lines, FB 10413-24-2, WA 7807-305, and TY 5578-220 and normal (N) parents and tester stocks for Dl 1 and Dl 2 genes. The F 2 FB 10413-24-2 × Carioca segregated 13 N:3C. F 3 families segregated 3N:1C. RAPD marker OPB-10 was linked to Lcr at 31.2 cM. F 3 families segregated 1N:3C. RAPD marker OPO16 was linked to Dl 1 at 27 cM. The F2 WA-7807-305 × Rio Tibagi segregated 3N:1C. RAPD marker OPS-03 was linked to Lcr at 32.6 cM.