Interrelationships of Some Agronomic Characters of Durum Wheat Under Supplementary Irrigation at Grain Filling Stage Conditions

Abstract

Abstract :Durum wheat (Triticum turgidum L. var. durum) yield in the semi-arid regions are limited by inadequate water supply late in the cropping season. The relationships between various morphophenological traits and yield were studied in durum wheat (Triticum durum Desf.) inbred lines grown under supplementary irrigation at mid anthesis stage conditions. The experimental material consisted of 133 F6 families of durum wheat. Correlation analysis and stepwise regression performed to evaluate traits affecting grain yield under supplementary irrigation conditions. The results indicated that the number of tillage per plant, the number of spikes per plant and above ground biomass mainly contributed to a better grain yield of durum wheat under supplementary irrigation at mid anthesis stage conditions.Keywords: durum wheat, supplementary irrigation, correlation, stepwise regression.