2nd International Triticeae Symposium
Richard R-C. Wang
In rye (Secale cereale L.), there are loci on chromosome arm 5RL which give rise to increased copper (Cu)- and iron (Fe)-efficiency, respectively. Four different wheat-rye translocations each harboring a terminal segment of different size of the rye chromosome arm 5RL were identified by test crosses and Giemsa-banding: 'T29' (5AS.5RL), 'T63' (5BS.5BL-5RL), 'Vhn' (4BS.4BL-5RL) and 'Cor' (4BS.4BL-5RL). The translocation break points were detected by chromosome painting technique GISH and the sizes of the rye chromosome segments involved were determined by computer image analysis. The Cu-efficiency gene Ce was physically mapped to the terminal region of 5RL, and the genes for mugineic acid and for hydroxymugineic acid synthetases involved in the strategy II of Fe-efficiency control to two intercalary regions of 5RL. In all wheat-rye translocation lines the Ce gene is linked to the dominant hairy neck character (HaI) from rye. This morphological trait and the RFLP probe 'WG 199' as well can serve as proper markers for a marker-based large-scale selection in wheat breeding.
Kynast, R. G.; Röder, M. S.; and Römheld, V., "Physical Mapping of Micronutritional Genes in Wheat-rye Translocations" (1994). Herbarium Publications. Paper 19.