Starch and Free Sugars during Kernel Development of Bomi Barley and its High-Lysine Mutant 1508

Michael Kreis

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At maturity the high-lysine barley (Hordeum vulgare L.) Ris0 mutants 1508, 527 and 29 kernels contained about 20% less starch and twice as much free sugars as the parent varieties Bomi and Carlsberg II. An enhanched effect on starch reduction and free sugar accumulation was observed during kernel development when the single mutants 527 and 29 are combined with the mutant 1508. At maturity, kernels of the double mutants 527/1508 and 29/1508 contained, respectively, 68 and 43% less starch than Bomi. The double mutant 29/1508 kernel had a slightly lower prolamin content than mutant 1508 which is the most prolamin-deficient single mutant. In the double mutant 527/1508, however, an almost complete suppression of prolamin synthesis was observed during kernel development. The percentage of lysine in the seed proteins of the double mutants was about the same as in the most extreme single mutant 1508. Based on the additive effect of the individual high-lysine genes in the double mutants, it is concluded that the influences of these genes on prolamin and starch synthesis are independent.
Original languageEnglish
Title of host publicationProceedings of the Seed Protein Improvement by Nuclear Techniques
Publication date1978
Publication statusPublished - 1978
EventSeed Protein Improvement by Nuclear Techniques: Baden, 28 March - 1 April and Vienna, 26-30 September - Vienna, Austria
Duration: 25 Sept 197729 Sept 1977


ConferenceSeed Protein Improvement by Nuclear Techniques


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