Abstract
Seventeen mutations resulting in an apparent loss of the epicuticular wax on barley spikes have been shown by complementation, test cross and F2 analyses to be dominantly inherited alterations of theCer-yy gene. The chemical composition determined by the four alleles 966, 968, 975 and 984 differs from that determined by the wild type in that none of the β-ketoacyl derived lipids (β-diketones, hydroxy-β-diketones and esters containing alkan-2-ols) are synthesized while the composition of the other wax lipids (alkanes, primary alcohols, aldehydes, esters containing alkan-1-ols and free acids) is markedly altered toward that characteristic of leaf blade waxes. We suggest that theCer-yy gene determines a regulatory component which upon mutation activates the gene(s) in the spike for the leaf blade acyl elongase system and at the same time represses the spike acyl and β-ketoacyl elongase systems.
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Abbreviations
- fas:
-
fatty acid synthetase
- GLC:
-
gas liquid chromatography
- TLC:
-
thin layer chromatography
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Lundqvist, U., Von Wettstein-Knowles, P. Dominant mutations atCer-yy change barley spike wax into leaf blade wax. Carlsberg Res. Commun. 47, 29–43 (1982). https://doi.org/10.1007/BF02907795
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DOI: https://doi.org/10.1007/BF02907795