Inheritance of the sesquiterpenes longipinenone and hydroxy-longipinenone within the Achillea millefolium complex (Compositae)

Three selfing and 13 crossing experiments between tetraploid individuals of Achillea ceretanica. Achillea collina, Achiliea distans ssp. 'styriaca' Sa ukel lined.), and Achillea pratensis (Achillea millefolium complex. Composi tae), five Fl crosses, three backcrosses and one further selfing experiment were carried our in order ro study the inheritance of longipinenone (1) an d its hydroxyl derivative (2). From these crossings, 1294 plants were studi ed by qualitative thin layer chromatography. Progenies from parent and Fl p lants without longipinenones (0-type, ll) uniformly contained none of these two sesquiterpenes. All other crossing experiments showed typical segregat ion patterns of 0-type, L-type (longipinenone ii) without hydroxy-longipine none, L.hh) and H-type (hydroxy-longipinenone (2) and occasionally longipin enone. L.H.) in the ratio of 1:1 and 1:3. According to these results both d erivatives are under dominant genetic control regulated by gents L. and H, whereby hydroxylation takes place after synthesis of longipinenone (1).