4. Correlation dependences between the structural elements of the yield in introduced accessions of durum wheat

The correlations between the yield and the elements which dete rmine it in 10 accessions of durum wheat have been studied. A positive correlation has been established between the plant height and the last internode’s length (r=0.72) which, in most of the investigate accessions, takes around 40% of the plant height. It ensures a high possibility for breeding genotypes resistant to lodging.
The number of seeds per spike and the number of spikelets per spike are in a high positive correlation with the weight of the seeds on the main spike (г=0.86; г=0.83). It is possible to use those traits as a reliable criterion in the selection of productive accessions.
A positive correlation was found between the productive tillering and the weight of the seeds on the main spike and the weight of the seeds per plant. A positive but poorly expressed dependence was established between the seed weight of the main spike and of the other tillers (г=0.50), the length and weight of seeds per spike (г=0.36) and a negative correlation – between the 1000-kernel weight and the weight of the seeds per plant (г=-0.51).