Holopainen, M., Hiltunen, R., Lokki. J., Forsén, K. and Schantz, M. Von. 1987. Model for the genetic control of thujone, sabinene and umbellulone in tansy (Tanacetun vulgare L.). —Hereditas 106: 205–208. Lund, Sweden. ISSN 0018–0661. Received August 1, 1986 Seven parental tansy (Tanacerum vulgare L.) plants were crossed by artificial pollination in the experiments in order to develop a schematic model for the genetic control of the thujone skeleton monoterpenes: thujone, sabinene and umbellulone. The progeny, comprising 232 plant individuals, were analyzed by gas chromatography. The essential oil was isolated from the leaves by means of a micro‐extraction technique. The sabinene (SI) x sabinene (SII) crosses mainly produced progeny of the sabinene type (63%). The sabinene (SI) x umbellulone (UI) crosses were mainly of the sabinene type (50%), although the urnbellulone type (27.5%) also occurred. The back crosses and control crosses indicated that the thujone type TI, i.e., the parental plant of the sabinene type SI, differs genetically from the other thujone type (T3). The thujone type T1, which is also able to synthesize sabinene, seemed to transfer unwanted characteristics to the sabinene type S1 (F1 generation). This was also characteristic of the F2 generation. This partially explains the small number of sabinene types appearing in nature. A schematic model for the genetic control of thujoneline biosynthesis earlier developed for tansy by LOKKI et al(1973) was improved by incorporating the results of the study on thujone and sabinene. In addition, the pathway of umhellulone biosynthesis was added to the genetic model.
Eight parental plants of tansy, Chrysanthemum vulgare, belonging to the camphor or thujone chemotypes, were crossed in 31 hybridizations. The progeny, containing 513 plant individuals, were analyzed by gas chromatography, which reveals at least three chemotypes among the offspring: camphor, thujone and sabinene. A schematic model for genetic control in the determination of the different chemotypes was worked out on the basis of this material. According to the model, at least seven of the loci controlling the biosynthesis of camphor and thujone must be assumed to be polymorphic.
Fünf neue Chemotypen mit Artemisiaketon, Chrysanthenylacetat, Isopinocamphon, Umbellulon und einem Sesquiterpenderivat C15H24O2 als Hauptbestandteile im ätherischen Öl von in Finnland wachsenden Rainfarnen [Chrysanthemum vulgare (L.) Bernh.] wurden nachgewiesen. Außerdem wurde Chrysanthemum‐Epoxid auch in finnischem Material gefunden. Isopinocamphon ist bisher im ätherischen Öl dieser Pflanze nicht angetroffen worden. Die Trennung der Komponenten geschah durch Säulen‐ und Gaschromatographie. Zur Identifizierung der Verbindungen wurden IR‐, NMR‐ und Massenspektrometrie benutzt.
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