Rolf Schlegel has put together an extensive list of all wheat varieties containing the 1RS.1BL translocation and recently updated his website at http://www.rye-gene-map.de/rye-introgression/. Recent surveys show that more than 45 % of breeding material may contain those translocations (Zhou et al. 2007) or 55% of CIMMYT bread wheat germplasm. This translocation has been deemed so important that it has been incorporated into >60 wheat varieties that occupy >50% of all developing country wheat area, almost 40 million hectares.
Illustration shows a wheat breeding line (2n = 6x + 2 = 44) with a pair of chromosome arms from rye (labeled green with genomic DNA from rye) translocated onto a wheat chromosome (1BL.1RS) and an additional chromosome pair from the wild species Thinopyrum bessarabicum (labeled red with genomic T bessarabicum DNA) from Trude Schwarzacher (eg Practical In Situ Hybridization, 2000, BIOS publishers).