Cytogenetical studies in wheat VI. Chromosome location and linkage studies involving Sr13 and Sr8 for reaction to Puccinia graminis F. Sp. Tritici

Abstract

Sr 13 was located on the fl arm of chromosome 6A and showed a recombination value of 0.54±0.07 with the centromere. Sr8 was localized to the opposite (α) arm and exhibited a recombination value of 0.44 ± 0.05 with the centromere. Genetic independence between Sr13 and Sr8 was confirmed in a genetic study involving a cross between two near.isogenic lines, each carrying one of the genes. The use of rare chimaeric plants in monosomic populations for isolating marked chromosome misdivision products was demonstrated. The β telocentric arm of chromosome 6A, previously unavailable in any stock, was isolated by this means. © 1972 CSIRO.