Correlations of yield and grain yield components of winter wheat varieties

Mean positive correlation (r = 0,47**) between grain yield and number of plants per m? and strong correlation between grain yield and number of spikes per m? were established (r = 0,55**). Weak correlation was established between grain yield and productive tillering (r = 0,24**). Strong positive correlation (r = 0,51**) is between the number of spikes per m? and productive tillering, as well as between the number of plants per m? and number of spikes per m? (r = 0,68**). Very weak negative correlation (r = -0,12*) is between productive tillering and the number of plants per m?. Regression equations of grain yield and other investigated traits, on the level of significance 5% and 1%, have linear form. By increasing one plant per m?, the number of spikes for one per m?, productive tillering for one, grain yield will be increased for 0,006 t/ha, 0,005 t/ha and 1,174 t/ha on the average. The other regression equations between the number of spikes per m?, number of plants per m? and productive tillering have linear form. By increasing one plant per m? and productive tillering for one, the increase of number of spikes per m? is 1,087 and 312,21 on the average. By increasing the number of plants per m?, productive tillering is reduced for 47,59 on the average.

Abstract licence: CC BY-SA

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