CHROMOSOME SUBSTITUTION IN HEXAPLOID WHEAT

Abstract

The procedures involved in the various phases of chromosome substitution in common wheat are briefly outlined and explained. Complications encountered with reciprocal translocations are clarified. The following subjects are discussed: development of chromosome-deficient series in other varieties, transfer of single chromosomes from donor varieties to chromosome-deficient lines to develop substitution lines, alien substitutions, and combination of two chromosome substitutions into a single line. There is a brief discussion of the value of the chromosome substitution method especially in the study of gene dosage and interaction as affecting certain characters.