1Lt - 2E | 20 - 6C | 47D - 2Lt ; 1Rt - 20 | 2E - 6C | 47D - 2Rt
All limits from polytene analysis (FBrf0021565)
male lethal crossing-over reduced in X
Roberts, 1964, 1965.
selected on the basis of reduced recombination in one chromosome arm.
Recombination reduced on chromosome 1.