A research on determining the relations between main stem and tiller yield in bread wheat (Triticum aestivum L.) cultivars grown in different sowing densities in cukurova conditions

This study was carried out in experimental field of Field Crops Department of Faculty of Agriculture in Cukurova University in randomized split blocks design with three replications in 2016-2017 growing season. The study aims to investigate the effects of different sowing densities(300,500,700 and 900 seed/m²) in terms of plant count per m², stem count per m², spike count per m², heading duration, heading-maturity period, plant height, spikelet count per spike, grain count per spike, grain weight per spike, thousand grain weight, hectoliter weight and grain yield in three cultivars of bread wheat (Adana-99, Gemini and Özkan). In the studied characteristics while heading duration and hectoliter weight didn't change, spike height, spikelet count per spike, grain count per spike, grain weight per spike and thousand grain weight decreased as plant count per m², stem count per m², spike count per m², heading-maturity period, plant height and grain yield increased. With the cultivars that were used in the research, it was also aimed to compare the plant height, spike height, spikelet count per spike, grain count per spike, grain weight per spike and plant yield by separately marking the main stem and fertile tillers of the randomly selected plant in ten. Within the experimented cultivars it has been seen that the main stem took the 1st place while first tillers took the 2nd, second tillers took the 3rd and third tillerstook the 4th place regarding the plant height, spike height, spikelet count per spike, grain count per spike and grain weight per spike. It has been seen that plant yield decreased as sowing density increased.