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Linkage mapping of genes controlling endosperm storage proteins in wheat 2. genes on the long arms of group 1 chromosomes



Linkage mapping of genes controlling endosperm storage proteins in wheat 2. genes on the long arms of group 1 chromosomes



Theoretical and Applied Genetics 75(4): 642-650



A translocation mapping procedure was used to map the Glu-1 genes, controlling high-molecular-weight (HMW) glutenin subunits on the long arms of group 1 wheat chromosomes, with respect to their centromeres. The Glu-A1 genes on chromosome arm 1AL were linked with the centromere but gave very different map distances (in cM) of 10.2 .+-. 3.5 and 33.9 .+-. 5.4 with test-cross and F2 progeny, respectively. The centromere-Glu-B1 and centromere-Glu-D1 map distances were estimated to be 28.1 .+-. 2.8 and 30.9 .+-. 2.7, respectively, using test-cross seeds. A telocentric mapping procedure gave a reduced map distance of 22 .+-. 3.5 for the centromere-Glu-D1 interval. Possible reasons for the differences between the mapping results obtained with test-cross and F2 seeds and with the translocation and telocentric procedures are discussed.

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Accession: 005813737

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