Abstract
Abstract Effect of flag leaf and/or awn removal on grain yield, kernel number and single weight were investigated in nine durum ( Triticum durum Desf.) and one hexaploid ( Triticum aestivum L.) wheat genotypes grown under dryland conditions in Jordan. The treatments were control, removal of the flag leaf, removal of the awns, and a combination of awn and flag leaf removal. Genotypes studied differed in the traits investigated in addition to other agronomic characters. Flag leaf removal, awn removal and their combination significantly reduced grain yield by 10.7, 15.9 and 21.2%, respectively. Reduction in kernel number per plant was 11.1, 11.3, and 11.2%, respectively. Kernel weight was decreased by 5.2 and 11.3% as a result of awn removal and the combination treatment, respectively, but not by flag leaf removal. Although no genotype × treatment interaction was detected for any of the traits studied, grain yields of the local cultivars which are adapted to dryland conditions were affected more than other genotypes by awns' removal.
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