Grain Yield and Some Physiological Traits Associated with Heat Tolerance in Bread Wheat (Triticum aestivum L.) Genotypes

Authors : Zahit Kayıhan KORKUT, Alpay BALKAN, İsmet BAŞER, Oğuz BİLGİN

Pages : 391-400

Doi:10.15832/ankutbd.448626

View : 59 | Download : 15

Publication Date : 2019-09-05

Article Type : Research Paper

Abstract :This research was carried out in the experimental fields of Department of Field Crops, Faculty of Agriculture, the  University of Namık Kemal in 2014-2015. In the study, totally 30 bread wheat insert ignore into journalissuearticles values(Triticum aestivum L.); genotypes  insert ignore into journalissuearticles values(15 cultivars; early, medium-early and late-maturing; 10 lines are tolerant to the heat-temperature stress which were  provided by CIMMYT-International Maize and Wheat Improvement Center);, 5 lines insert ignore into journalissuearticles values(were taken from the same  university’s wheat breeding program which was collaborated by the CIMMYT); were used as an experimental material.  The experiment was adjusted in a split-plot design with 3 replicates. Sowing dates insert ignore into journalissuearticles values(Normal insert ignore into journalissuearticles values(NS ≈ November 09, 2014);  and Late sowing insert ignore into journalissuearticles values(LS ≈ January 09, 2015);); were constituted the main plots, and the genotypes constituted the sub-plots.  These physiological traits insert ignore into journalissuearticles values(insert ignore into journalissuearticles values(membrane thermostability insert ignore into journalissuearticles values(MT);, canopy temperature insert ignore into journalissuearticles values(CT);, leaf chlorophyll content insert ignore into journalissuearticles values(LCC);  and stomatal conductance insert ignore into journalissuearticles values(SC);); were measured at the LS stage due to giving much more correct, logical and meaningful  results, but grain yield insert ignore into journalissuearticles values(GY); was fixed for all the sowing dates. Obtained findings are: The GY was varied between insert ignore into journalissuearticles values(4.35- 6.34 t ha-1); for genotypes; the MT was changed between insert ignore into journalissuearticles values(10.58-66.25%);; the CT was realized between insert ignore into journalissuearticles values(17.67-22.00 oC);;  the LCC was varied between insert ignore into journalissuearticles values(38.30-53.30 SPAD); and the SC was changed between insert ignore into journalissuearticles values(25.20-166.80 mmol m-2 s-1);. It was  observed that most of the CIMMYT originated genotypes are tolerant to high-temperature stress and most of the wheats  that are grown in Thrace Region are negatively affected by the high-temperature stress.
Keywords : Heat tolerance, Canopy temperature, Chlorophyll content, Membrane thermostability, Stomatal conductance

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