Effect of defiecit irrigation on yield, yield components and canopy temperature of triticale (XTriticosecal) genotypes
Subject Areas : Journal of Plant Ecophysiologyطاهره ایراندوست 1 , احسان بیژن زاده 2
1 - دانشجوی دانشگاه شیراز
2 - دانشگاه شیراز
Keywords: canopy, Deficit humidity, Cultivars, 1000-kernel weight,
Abstract :
To investigate the effect of terminal drought stress on yield, yield components and canopy temperature of triticale genotypes, a field experiment was conducted at Agriculture College and Natural Resources of Darab, Shiraz University during 2013-2014 growing season. Treatments included (Common irrigation, deficit irrigation after flowering, milk development, and dough development stages), and triticale genotypes (Sanabad, ET-83-18, line 20, line 8 and line 10) were assigned in main factor and sub factor, respectively. The experiment was split plot as randomized complete block design with three replications. Sanabad cultivar with 336.1 had the highest spike number/m2 when exposed to deficit irrigation after flowering. No significant difference was observed between grain number per spike of deficit irrigation after flowering and milk development treatments in Sanabad, Line 20, and Line 10. Line 10 with 46.23 g and ET-83-18 with 34.83 had maximum and minimum 1000-kernel weight, under deficit irrigation after flowering, respectively. In all genotypes, canopy temperature in deficit irrigation after flowering and milk development treatments was more than common irrigation and Line 20 with 6423 kg/ha grain yield was the best genotype under deficit irrigation after flowering and had the lowest canopy temperature compared to other genotypes. It was concluded that canopy temperature can be a suitable tool in evaluation and selection of tolerant genotypes under water deficit condition.
