Rye–wheat hybrids: the production of wheat chromosome additions to rye

To produce rye–wheat addition lines, 21-chromosome rye–wheat hybrids were produced by crossing tetraploid triticale with diploid rye. The subsequent selfing of the hybrids lead to monosomic and double monosomic wheat additions to rye. Screening of the progeny was carried out using the C-banding technique. The wheat additions can be fertile. Wheat chromosome 6B was the chromosome most frequently added to rye. Ribosomal spacer probe pTa250.4 was used to confirm the results obtained by C-banding for the 6B wheat additions to rye. Embryos of the 21-chromosome rye–wheat hybrids showed a good potential for propagating more plantlets after they had been transferred to artificial medium.Key words: rye–wheat addition lines.