MAPPING OF THE TRANSEC WHEAT-RYE TRANSLOCATION

Abstract

Lines possessing an isochromosome derived from the Transec translocation chromosome were isolated and crossed to known telocentric 4A stocks. From observations on chromosome pairing behaviours in these crosses it was determined that the left arm of chromosome 4A is involved in the translocation. The rye segment was located one crossover unit from the centromere of chromosome 4A by the telocentric linkage method.