The results of our study are about of yield capacity and stability of different winter wheat variety in Transilvanian Plain conditions, as well as an analysis of the main elements of productivity. Under semi-arid conditions wheat genotipe with a longer grain filling duration give lower yields if occur high water and temperature deficiency. The plant genotype and environment both influence the rate and duration of grain filling, which have a directly influence on the grain productivity. Productivity components and some morpho-physiological traits such as number of grains per spike, grain weight per ear, thousand kernel weight , plant size and plant density are closely related to the production of grain. On the other hand,between grain yield and protein content and wet gluten content there are an negative relationship.The experiments were conducted over two years, 2011 and 2012, at Agricultural Research and Development Station Turda, which are characterized with a high rainfall and temperatures favourable for winter wheat crop. The biologic material used in our study is quite varied, consisting of 25 winter wheat varieties of local and foreign origin.On the bases of results obtained it can say that winter wheat genotypes studied had different reactions to the environmental conditions and agro-technological factors apply.Although most elements of productivity studied are under genetic control, but more or less environmental influence that affect negatively the main elements by increasing or decreasing the production.The best results were registered to winter wheat varieties released by ARDS Turda which means that they have a good adaptability and yield stability to the specific environments.The foreign winter wheat varieties had also a very good behaviour recording high yields, which means they have a good adaptability which recommend them for use in this area. Concluding, on the basis of our results, the wheat growers from Transilvania, have large possibilities to choice the best cultivars for their particular environmental and farming conditions.

wheat, yield, thousand-kernel weight; grain weight; number of grains per spike;

Presentation: oral