Abstract

The human and environmental conditions, leading to increased production of wheat (Triticum aestivum) for yield. for this purpose, it is necessary to understand the physiological components of growth of wheat and grains. Publications warn that any precondition to flowering has effects on grain weight and grain dimensions. Two wheat genotypes (Bacanora and Kambara) were sown in field conditions under two planting densities (BD-44 pl / m2-AL-370 and pl / m2). Ten days pre-flowering were extracted and measured floral carpels with lupa (flower position F1 and F2 of five central spikelets spikes). From flowering to 30 days was dissected and weighed the pericarp of 8 grain (grain position G1 and G2 of four central spikelets spikes). In harvest, grain positions G1 and G2 were weighed and measured in ten central spikelets spikes. The carpels measured between 0.99 and 1.17 mm long, 1.12 to 1.20 mm wide and 0.91 and 0.99 mm high. Grain 2 BD (Bac and Kam), reached dimensions (length, width and height) of 7.28, 4.12 and 3.60 mm and 8.07, 4.54 and 3.73 mm. At 12 days post flowering pericarp reaches the maximum weight. The grain weight ranged between 50.50 and 74.76 mg, depending on the density, genotype and grain position. The dimensions of length, width and height remain the same behavior from pre-flowering to harvest, The dimensions of length, width and height remain the same conduct from pre-flowering to harvest the long develops maximum variation in size.