Growth and yield responses of ten wheat (Triticum aestivum L) genotypes to drought

Abstract

In two successive seasons (2017/ 2018 and 2018 /2019), the trends of ten wheats (Triticum aestivum L) genotypes were assessed to drought stress at the Agricultural Research Station, Faculty of Agriculture, Assiut University, Egypt. Drought obtained by skipping four irrigations of seven irrigations of control. Generally, droughts caused reduction for all the estimated morphological and physiological traits. The data revealed that the plant height was greatly affected in AIL134 and Sids12. Spike length, 100 grains weight and grains yield per genotype were adversely affected in AIL103, the former was affected in Sids12 and the middle one was reduced in Giza168 under drought stress. Also photosynthetic pigments were reduced in AIL108, AIL112 and in the Egyptian genotypes (Giza168 and Sids12). On the other hand, these traits were moderately affected under drought in AIL120, AIL129, AIL142 and AIL148 genotypes. Statistical analysis revealed that the drought was significantly affected all traits except chlorophyll b contents. Also the differences between the genotypes were significant. Most of the interactions between the genotypes, treatments and years were significant with some exceptions as those for spike length and weight of 100 grains.