Abstract
Biological production of 12 populations of weed species Abutilon theophrasti Medik. from diff erent geographical origin was studied in our agroecological conditions. Seeds of these populations were collected at the stage of physical maturity at the following locations: Catalonia-Spain (CAT), Croatia (CRO), Greece (GRE), Hungary (HUN), Iowa-USA(IOWA ), Legnaro-Italy (ITA), Minnesota-USA (MIN), Portugal (POR), Serbia (SER), Slovenia (SLO), Arganda-Spain (SPA) i Piza-Italy (TOS). In the autumn of 2013 seeds were planted at the Experimental farm of Faculty of Agriculture 'Radmilovac' with density 1 plant per 0.25 m2. At the stage of maturity numerous vegetative (plant height, root length, the number of branches, the number of leaves, leaf area) and generative (the number of capsules per plant, the number of locules per capsule, diameter of capsule, weight of seeds per plant) parameters were measured. Comprehensive analysis of the measured parameters was confirmed that the biological production of the studied populations differ, whereby these differences depended on the observede parameters. For vegetative parameters, differences were most pronounced for leaf area. For generative parameters differences between populations were most pronaunced for the number of capsules per plant and weight of seeds per plant.
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