Variability and interrelation of yield components in fiber hemp

Abstract

Variability and interrelation of yield components in fiber hemp were analysed in field experiments. This research included 20 commercial varieties currently being cultivated in Europe. Significant variability was determined for plant height, stem yield, fiber content and fiber yield, so these materials can be useful as a good base for future fiber hemp breeding and production improvement. Stem diameter was predominantly determined by ecological factors, and genetic background of examined varieties had small influence on expression of this trait. Regarding expression of other yield components, influence of genetic factors was more important than environmental conditions. Correlation between analyzed traits shows that high stem and fiber yield are achieved in higher populations of fiber hemp with thicker stem. Fiber content increased with stem thickness increase.

U poljskim ogledima je ispitivana varijabilnost i međuzavisnost komponenti prinosa konoplje za vlakno. U istraživanja je bilo uključeno 20 sorti koje se danas komercijalno gaje u Evropi. Varijabilnost visine biljke, prinosa stabla, sadržaja vlakna i prinosa vlakna je u ispitivanom materijalu značajna i on može poslužiti kao dobra osnova za dalji rad na oplemenjivanju i unapređenju proizvodnje konoplje za vlakno. Istraživanja su pokazala da je debljina stabla u prvom redu determinisana uslovima spoljne sredine a da je genetski faktor od manjeg uticaja na ekspresiju ovog svojstva. Kod ostalih analiziranih osobina izraženiji je značaj nasledne osnove u odnosu na uslove sredine. Korelacije između analiziranih osobina ukazuju da se veći prinosi stabla i vlakna postižu u porastima veće visine i debljeg stabla. Sa povećanjem debljine stabla povećava se i sadržaj vlakna u stablu.