dc.description.abstract | The aim of this study is to investigate phenotypic variability of yield components for seven
different durum wheat genotypes (Windur, Žitka, KG Olimpik, KG-28-6, KG-3405-03, KG-43-
33-1, and KG-44-3-1), which were grown during two years (2012/2013 and 2013/2014) at
certified organic trial located in Mršinci, the Municipality of Čačak, Serbia. The field experiment
was conducted in a randomized block design with three replications with plot of 5 m² on the soil
belonging to the loamy clay type. Experiment was carried out by the organic technology of
farming production of durum wheat.
For analysis of plant height and spike characteristics, 60 plants in full maturity stage were used
(20 plants per replication). The primary tiller of plant was used for analyzed plant height, spike
length and number of spikelets per spike.
Plant height, on average, ranged from 76.0 cm (Olimpik) to 92.1 cm (KG-3405-03), spike length
from 6.9 cm (KG-44-3/1) to 8.2 cm (Windur) and number of spikelets per spike from 19.3
(Žitka) to 22.5 (Windur). Variability for plant height was similar for both of years (CV=3.6%,
3.9%, respectively), but for spike length (CV=5.5%, 6.6%, respectively) and for number of
spikelets per spike (CV=5.4%, 6.2%, respectively) was lower in the first than in the second year.
Through variance analysis, a highly significant difference in mean values for all investigated
components was established. Phenotypic analysis of variance indicated that ecological factors
had higher impact in relations to genetic factors on expression of all three investigated traits. | sr |