PJB-2017-756
DRY MATTER REMOBILIZATION, YIELD AND YIELD COMPONENTS OF DURUM (TRITICUM DURUM DESF.) AND BREAD (TRITICUM AESTIVUM L.) WHEAT GENOTYPES UNDER DROUGHT STRESS
Tofig Allahverdiyev
Abstract
Drought is a major limiting factor affecting wheat production in the world. We aimed to study the effect of soil water deficit on dry matter remobilization (DMR), grain yield (GY) and yield components of durum and bread wheat genotypes. Drought stress accelerated DMR. Lowest remobilization of dry matter into grains was detected in the tallest, late heading genotypes, which are also characterized by low harvest index (HI). Drought stress less affected on plant height (PH), peduncle length (PL), spike length (SL), spike width (SW), spikelet number per spike (SNS), strongly affected on biological yield (BY), spike mass (SM), grain number per spike (GNS) and grain mass per spike (GMS), thousand kernels mass (TKM). Generally, GY was higher in bread wheat than that durum wheat. GY positively and significantly correlated with spikes m-2 (SN), BY and HI under drought stress condition. We consider that wheat characteristics DMR, SN, BY, HI are good selection criteria under drought stress. The study of yield and yield traits has shown that bread wheat is more tolerance to drought stress.
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