Evaluation of early seedling traits of different wheat cultivars for breeding criteria in drought and heat environments

The current study aimed at assessing the possibility of breeding criteria of bread wheat genotypes (Triticum aestivum L.) to the early seedling traits for drought and hot environments. The objective of this study was to evaluate the relationships between grain yield with grain quality, germination and seedling traits of wheat genotypes were sown at two sowing date normal sowing date (cool) and late sowing date (Hot) and two irrigation (rainfed (Rf) and irrigated (Ir)). The results indicated that, the relationship between grain yield (Hot-Ir) with seminal root length under cool-Ir and cool-Rf, r=0.535* ve r=0.522*, were positively correlated respectively. On the other hand, the relationship between grain yield (Hot-Ir) with seedling root weight (cool-Rf) and fourth leaf area (Hot-Rf) were negatively correlated, r=-0.512* ve -0.637**, respectively. Special attention was paid to the strong relationship between grain yield and physiological traits were acheived under cool-Rf grain yield with cool-Ir fourth leaf chlorophyll, r=0.657**. In the same way, under Hot-Ir grain yield was very strongly related with Hot-Ir and fourth leaf relative water content and fluorescence parameter (Fv/Fm), r=-0.638** and r=0.641**, respectively.