Articles
THE EFFECT OF CONTAMINATING AN /-/-Α-BISABOLOL WITH AN /-/-Α-BISABOLOLOXIDE (A, B) CHEMOTYPE OF TETRAPLOID CHAMOMILE
Article number
749_8
Pages
97 – 102
Language
English
Abstract
Tetraploid highbreed-cultivars of German chamomile differ significantly in their essential oil composition.
In order to estimate the risk of genetic contamination resulting in quality losses, a population of 198 plants of the tetraploid /-/-α-bisabolol-type cultivar Manzana was crossbred by open pollination with 2 plants of the bisabololoxide-containing cultivar BK-2. The bisabololoxide-content is transmitted dominantly by the gene O/o.
Five subsequent generations of this crossbreeding were analyzed and the results compared with expected values of the Hardy-Weinberg equilibrium for tetraploid organisms.
The observed values showed a high correspondence with the theoretical ones in each generation, especially at calculation models presupposing BK-2 individuals with three to four dominant alleles and a potential crossing over during meiosis.
According to the present results changes in quality of herbal starting materials are predictable and calculable.
In order to estimate the risk of genetic contamination resulting in quality losses, a population of 198 plants of the tetraploid /-/-α-bisabolol-type cultivar Manzana was crossbred by open pollination with 2 plants of the bisabololoxide-containing cultivar BK-2. The bisabololoxide-content is transmitted dominantly by the gene O/o.
Five subsequent generations of this crossbreeding were analyzed and the results compared with expected values of the Hardy-Weinberg equilibrium for tetraploid organisms.
The observed values showed a high correspondence with the theoretical ones in each generation, especially at calculation models presupposing BK-2 individuals with three to four dominant alleles and a potential crossing over during meiosis.
According to the present results changes in quality of herbal starting materials are predictable and calculable.
Authors
E. Mader, B. Bein-Lobmaier, J. Novak, C. Franz
Keywords
chamomile, contamination, population genetics, quality assurance, tetraploid, /-/-α-bisabolol, /-/-α-bisabololoxides
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