Transfer of the Glu-D1 Gene from Chromosome 1D of Breadwheat to Chromosome 1R in Hexaploid Triticale |
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| Authors: | A J Lukaszewski Christine A Curtis |
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| Institution: | Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, U.S.A. |
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| Abstract: | The 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 the Glu-D1d allele 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 the Glu-D1d allele. 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 hexaploid wheat. |
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| Keywords: | triticale breadwheat baking quality homoeologous pairing translocation |
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