Evaluating durum wheat performance and efficiency of senescence parameter usage in screening under Mediterranean conditions
Keywords: Durum wheat. grain yield, senescence, chlorophyll, water stress
AbstractThe present study was led on the experimental site of station ITGC in sétif Algeria. The objectives of this study is evaluating durum wheat performance and testing the efficiency of senescence parameter usage in screening. Grain yield (GY) and above ground vegetative biomass (BIO) were measured. Thousand-kernel weight (TKW) was determined from sub-samples taken from harvested grains of each plot. Leaf senescence (S) was evaluated by numerical image analysis (NIA) and chlorophyll content (Chl) measured by SPAD instrument. Study of correlation between grain yield and its components, revealed the absence of significant correlations between grain yield, thousand-kernel weight and biomass (r = 0.07 and 0.47 respectively) but there is a significant negative correlation between grain yield and number of days from sowing to heading (DH) (r = -0.75). A significant negative correlation between chlorophyll content and average senescence (Sa%) was noted in this study (r = -0.68). A significant positive correlation showed between Σ50s and grain yield suggests that genotypes with slow senescence showed highest yield. The absence of significant correlation between grain yield and thousand-kernel weight was noted when the water stress was seen during period of grain filling.
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