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The Journal of Heredity 1991:82(6):494-496
© 1991 The American Genetic Association 82:494-496

other

Tests of Linkage of Isozyme Loci with Five Primary Trisomics in Soybean, Glycine max (L.) Merr.

B. R. Hedges, and R.G. Palmer

From Agriculture Canada, Harrow Research Station Harrow, Ontario, NOR 1G0
U.S. Department of Agriculture, Agricultural Research Service, Cereal and Soybean Improvement Unit, Midwest Area, Departments of Agronomy and Genetics, Iowa State University Ames

Address reprint requests to Dr. Hedges at the address above.

Abstract

In a number of plant species, primary trisomics have been used to establish the chromosomal location of genes and to consolidate linkage maps. In soybean, Glycine max (L) Merr., five of a possible 20 primary trisomics have been characterized. In this study, chromosomal locations of several isozyme loci were investigated by using the primary trisomics A, B, C, D, and S. Only one locus, Dial (diaphorase), had segregation ratios in the F2 progeny of trisomic F, hybrids that were significantly different from disomic segregation ratios. In crosses of four different disomic lines by Trisomic D, F2 segregation ratios fit a trisomic segregation ratio, thereby indicating that Dia 1, which has not been mapped to a linkage group, was located on the extra chromosome in Trisomic D. In all other linkage tests, loci were not associated with a primary trisomic


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