Seed position effect on grains micronutrient content of ten wheat genotypes

The characteristics of seeds obtained from nine varieties of wheat (Triticum aestivum) from different position were evaluated. A field experiment was set up in a farmer`s field at Coonalpyn, in 2010. Nine varieties of T. aestivum L. (BT-Schomburg, Excalibur, Genaro. Halberd, Janz, Machete, Molineux, Oxley and Trident) and one of Triticum durum (Yallaroi) were sown in a randomized block design with four blocks. Accumulation of nutrients in seed in different tillers did not follow a similar trend for all nutrients. Zinc (Zn) content in seed on main tillers was greater in middle spikelets, outer sidle florets (MSPK-OF) compared to the same position on secondary tillers. Other nutrients showed different patterns of accumulation in seed from different positions on the main tiller. The amount of Zn was similar in seed from basal spikelets (BSPK) and upper spikelets (USPK) in both tiller orders.   Key words: Wheat, seed position, micronutrient content, genotype.