Inheritance of Dhurrin Content in Mature Sorghum Leaves1
- H. J. Gorz,
- F. A. Haskins and
- K. P. Vogel2
Seedlings of both KS8 and N32 sorghum[Sorghumb bicolor (L.) Moench] were high in dhurrin [p-hydroxy-(S)-mandelonitrile-β- D-glucoside] and thus in hydrocyanic acid potential (HCN-p), but the HCN-p of mature leaves from field-grown plants of KS8 was only about one-tenth as high as that of N32. A study of the inheritance of this large difference between KS8 and N32 revealed that a single major gene pair was responsible. There were no obvious maternal effects and Fl'S were generally intermediate in HCN-p level betweent he two parents, indicating that neither high nor low HCN-p was completely dominant. HCN-p level was inttuenced by genetic background since mean values of the low and intermediate HCN-pcl asses increased slightly as the proportion of genetic background ascribable to N32 was increased. A survey of 102 additional sorghums revealed that the gene for low HCN-p carried by KS8 does not appear to occur widely because KS8h ad the lowest HCN-pof all entries assayed.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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