PCR profiles of the 'Chinese Spring' nulli-tetrasomic lines and the diploid donors of hexaploid wheat, amplified with F3H copy-specific primers. The length of the PCR products is given in base pairs to the right. Designations '1A', '1B' etc. correspond to 'nulli' chromosome in the certain nulli-tetrasomic line; 'Tu' – T. urartu, 'Aes' – Ae. speltoides, 'Aet' – Ae. tauschii.