Transfer of theGlu‐D1Gene from Chromosome 1D of Breadwheat to Chromosome 1R in Hexaploid Triticale

摘要

AbstractThe use of hexaploid triticale as a crop for human consumption has been limited by its inferior bread‐making quality. To ameliorate this problem, a segment of chromosome ID of breadwheat with theGlu‐D1dallele encoding for high molecular weight glutenin subunits 5 7plus; 10 was translocated to chromosome 1R of the hexaploid triticale ‘Rhino’ through a combination of a centric break‐fusion translocation followed by 5D(5B)‐induced homoeologous pairing. The resulting recombinant chromosome 1R has a small interstitial segment of ID with theGlu‐D1dallele. The maximum physical length of the translocated segment is estimated at about 16.5 of 1DL. Frequency of translocations involving the long arms of homoeologous group‐1 chromosomes in the analyzed progeny suggested that homoeologous recombination in triticale was substantially higher than that previously reported in