Özet:

Seven wheat varieties were cultivated during the winter seasons of 2013 and 2014 in Sulaimani Crop Research Center - Bakrajo. A  Field  experiment was conducted  each year as CRBD with three replications.The most important vegetative and reproductive criteria were studied as well as dry matter accumulation and its partitioing through destructive samples. They were taken every 10 days in order to study the partitioning of assimilates to different parts of the plant leaf, stem, and spike under different environmental factors of the two years.The influence of the duration length of seed filling on the accumulated dry matter and its partitioning to the spike, the Spike Partitioning Coefficient and growth parameters such as Seed Growth Rate (SGR) and Seed Filling Duration (SFD)were studied. Environmental factors were influenced the Dry matter accumulation and the partitioning of assimilates as well as the length of the growth stages especially SFD.

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