TILLERS PATTERNS OF BREAD WHEAT AND GRAIN YIELD

PRODUCTIVITY UNDE

 ABIOTIC STRESS

Abstract
In wheat, Triticum aestivum L., tiller production and survival determine final spike number and play very important roles in
grain yield formation. This field trial aimed to investigate the genetic and physiological basis of tillers production and its
effect on grain yield components. The growth patterns of wheat were controlled by water stress and catalytic stress with
fertilizers and treatment time for different varieties. Tillers’ numbers were decline in most of the planted wheat varieties, which
led to a slight reduction in the final grain yield. Wheat with lower tillers numbers intended to produce a higher quantity of
grain yield. They also are efficient in water and fertilizer usage. Water stress presents no effect on grain yield in the main stem
and also on plants with limited tillers number. 87% to 100% of the wheat grain is produced by the main stem and T1 and T2.
Wheat varieties that produce limited tillers are capable of achieving relatively high yield in drought conditions and less
fertilization without sacrificing optimal yield under optimum conditions. This because of the heavier grains, rather than
increasing the number of tillers. This coincides with a statistical increase in the ratio of protein and water consumption.
Fertilizers, especially nitrogen, play a key role in tillers formation if they applied at the right time. Farmers can utilize nitrogen
application time according to what they desire in their field if there want more or fewer tillers formation with consideration to
the quality of grain yield