ANTIOXIDANT ENZYMES ACTIVITY IN WHEAT GENOTYPES GROWN IN WESTERN REGION OF IRAQ

Abstract

In order to screening 21 genotypes of wheat introduced by Ministry of Science and Technology and suitable to arid and semi-arid regions in addition to three registered cultivars (IRAQ, Al Diyar and Al Mahmodia). The experiment conducted according to RCBD with three replications for each genotype. The results showed that there are new promising genotypes for plant breeding programs from the introduced genotypes and planted in the second season in row in the western region of Iraq. In addition to the possibility of registering some of them after confirming their productivity for next seasons under such conditions.  The genotypes varied in their content of antioxidant enzymes, the cultivar IRAQ was superior over all genotypes especially when it gave highest activity of CAT, SOD and AO (40.18, 205.03 and 56.62 U g-1 FW min-1 respectively) followed by genotype 39. While the other genotypes showed low activity of the antioxidant enzymes and this confirms the fact that genotypes also might be varied in their chemical composition and metabolisms. The genotype 4 was superior in fertility ratio (3.09%) compared to genotype 11 that gave lowest ratio while in 1000 grain weight it was observed that genotype 18 gave highest average over other genotypes (59.47 g) and genotype 31 gave the highest average of yield in hectare. According to the genotypes that can be nominated to be used in further breeding programs are 4, IRAQ, 9, 25, 29, 30 and 39.

Keywords

• wheat
• antioxidant enzymes
• plant breeding
• ros
• screening