Chromosomal location of a K/Na discrimination character in the D genome of wheat.
K/Na ratios have been determined in the leaves of salt-treated plants of 14 disomic substitution lines in which each of the D-genome chromosomes replaces the homoeologous A- or B-genome chromosome in the tetraploid wheat variety Langdon (AABB genome). Aneuploid lines of hexaploid bread wheat (cv Chinese Spring) having a reduced or an enhanced complement of chromosome 4D have also been examined. These investigations show that the gene(s) determining K/Na ratios in the leaves of wheat plants grown in the presence of salt is located on the long arm of chromosome 4D.
Centre for Arid Zone Studies, Department of Biochemistry and Soil Science, University College of North Wales, LL57 2UW, Bangor, Gwynedd, Wales, UK.
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Gorham
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Hardy
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Wyn Jones
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Joppa
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Law