Abstract
The composite alcohol dehydrogenase zymogram of sunflowers, Helianthus annuus, consists of 12 distinct bands. Genetic studies suggest that the slowest-moving three bands are allozymic dimers. They are controlled by a gene designated Adh 1 having two codominant alleles, Adh F1 and Adh S1 . The heterozygote produces three bands as expected with a dimer molecule, while the homozygotes produce but one band each, consisting of FF or SS homodimers. The genetic evidence is supported by dissociation-recombination experiments in which the homodimers were separated and allowed to rejoin as parental homodimers and the hybrid heterodimer. Adh FS1 was found in only three of 422 cultivar seeds of one collection out of about 70 (over 6000 individual seeds tested) and was seen only infrequently in the seven wild collections examined. Adh SS1 has never been found in the cultivar collections studied and but rarely in the wild populations sampled.
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Supported by BioMed, General, and Graduate School Research Grants of the University of Kansas and by NSF grant GB 35853.
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Torres, A.M. Sunflower alcohol dehydrogenase: ADH1 genetics and dissociation-recombination. Biochem Genet 11, 17–24 (1974). https://doi.org/10.1007/BF00486615
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DOI: https://doi.org/10.1007/BF00486615