Chromosome 12, altered in its extreme distal long arm by transposition of the right arm of chromosome 8, was identified as translocation 2778. T12L-8R was exceptional because the recessive speckled-dwarf was associated with break point 128. Through the duplication-deficiency occurrence in cotton translocations and self pollination, a tetra-nullo combination was stabilized. It was marked by the speckled-dwarf expression and by four arms of 8R and no distal 12L arms. The recovery of the altered 12(8) chromosome was investigated in F₂, in ovular transmission of the F₁. Recovery of the SD in F₂ approximated 7-8% and the associated recessive mutants of linkage group V, known to be localized on 12L, ranged from 50% for bw(1)bw(1) to 12-14% for Gl(2)Gl(2). Normal recovery for recessives is 25%; therefore efforts were made to ascertain whether pollen having altered 12(8) was competitive and whether there was loss during the embryonic stages. Because SD expression was usually accompanied by normal bract and glanding indicated linkage of the three, recombination rates were estimated. Low recombination was estimated for loci near the break point and normal amount for loci proximal the centromere. The conclusion is that order SD=mt-bw(1)Gl(2) although the map distances are underestimated.