Correlations of yield and grain yield components of winter wheat varieties

Abstract

Mean positive correlation (r = 0,47**) between grain yield and number of plants per m² and strong correlation between grain yield and number of spikes per m² 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 m² and productive tillering, as well as between the number of plants per m² and number of spikes per m² (r = 0,68**). Very weak negative correlation (r = -0,12*) is between productive tillering and the number of plants per m². 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 m², the number of spikes for one per m², 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 m², number of plants per m² and productive tillering have linear form. By increasing one plant per m² and productive tillering for one, the increase of number of spikes per m² is 1,087 and 312,21 on the average. By increasing the number of plants per m², productive tillering is reduced for 47,59 on the average

Yield and yield traits of durum wheat (Triticum durum desf.) and bread wheat (Triticum aestivum L.) genotypes under drought stress

“…The highest SN of genotypes Gyrmyzy gul1 and 12 nd FAWWON№97 could be due to high tillering capacity. Positive significant correlation of SN with GY was in agreement with GARCIA DEL MORAL et al (2003) and PROTIC et al, (2009). SL is a desirable trait under rain-fed condition, positively correlated with GY.…”

Multivariate statistical analysis of some traits of bread wheat for breeding under rainfed conditions

“…Yield of wheat depended mostly on spikelet number, grain number, and 1,000 seed weight. Other investigations show, however, that the yield of wheat may be to a greater extent formed by the number of spike, number of grain and 1,000 seed weight (Protić et al, 2009;Rymuza et al, 2012). The applied method of PCA made it possible to fully assess the relations among wheat traits which are used for the analysis of observed diversity in regard to different traits.…”

“…It is clear that both of the first two factors which would express the combined effect of stem diameter, leaf width, tiller number, spike length, floret number, spikelet number, grain number, grain diameter, grain length, 1,000 seed weight were most closely associated with grain yield. Grain yield of bread wheat may be regarded as being composed of the components such as heads per plant, spikelets per spike, grains per spike and the 1,000 seed weight (Leilah and Al-Khateeb, 2005;Protić et al, 2009).…”

“…While researching crops grown for grain yield, their yield components are marked and these are: spike density, number of grains per spike, and 1,000-seed weight. Grain yield of wheat is the integration of many traits that affect plant growth throughout the growing period (Leilah and Al-Khateeb, 2005;Protić et al, 2009). Each trait changes to a different extent and direction under the influence of environmental factors.…”

Characterization of Agronomical and Quality Traits of Winter Wheat (Triticum aestivum L.) for Fusarium Head Blight Pressure in Different Environments

“…Also, for the selection of high yielding wheat varieties, 1000 kernel is often used as it is closely related to grain yield [40]. Protić et al [41] concluded that components such as heads per plant, spikelets per spike, grains per spike and the 1000 kernel weight can be considered part of grain yield of bread wheat. Besides, the fact that 1000 kernel weight and test weight are components of yield means these traits can be used to determine yields of flour and in the milling industry as major quality determinants [42].…”