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The Journal of Heredity 1997:88(6):557-559
© 1997 The American Genetic Association 88:557-559

other

Assignment of Est1 Locus to Soybean Linkage Group 4

J. Abe, T. Hirata, and Y. Shimamoto

Laboratory of Plant Genetics and Evolution, Faculty of Agriculture, Hokkaido University Sapporo 060, Japan

Corresponding Editor: Reld G. Palmer

Abstract

Linkage tests were conducted between an esterase locus, Est1, and loci coding for four isozymes and two morphological markers in a cross between cultivars Shiratsurunoko and Suzuhime. The loci tested were Dia1 (diaphorase), Enp (endopeptidase), Idh2 (isocitrate dehydrogenase), Pgm1 (phosphoglucomutase), Ln (leaf shape), and W1 (flower or hypocotyl color). A contingency chi-square test indicated a significant deviation from the expectation of independent inheritance between the Est1 and the Enp and Ln loci, members of linkage group 4. Based on the combined F2 and F3 data, recombination values were estimated as 32.3 ± 2.1% for Est1 versus Enp and 20.4 ± 2.2% for Est1 versus Ln. The recombination value between the Enp and Ln loci was calculated as 15.8 ± 2.0%. The Est1 locus was therefore assigned to linkage group 4, and the gene order was determined as Est1-Ln-Enp.


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