Correlation dependencies between yield and some elements of productivity in lines of spring six-row barley

Darina Dimova, Darina Valcheva, Milka Dimitrova-Doneva

Abstract: 15 lines of spring six-row barley were studied in the period 2015-2017. The research was conducted in the Institute of Agriculture - Karnobat. Yield was reported and biometrical measurements were made of the following traits: spike length, grain number, sterile spikelet number per spike, grain weight per spike and 1000-grains weight. Average value and variation of the traits were established. The aim of the study was to establishe correlation dependencies between yield and some productivity elements to the spring six-row barley. The results showed that the lines of spring six-row barley have a high yield and good values of the elements of productivity. Line K-172-14 was with the longest spike, the biggest number of grain, the highest grain weight per spike and the highest 1000-grain weight. The highest yield and the smallest sterile spikelet number were formed by the line К-235-14 (5070 kg/ha). Two main components heavier than 1 were extracted – they explain over 75.10% from the variation. The first component is related to spike length, grain number per spike, grain weight per spike and 1000-grains weight. The second component determines the variation, which is due to yield and sterile spikelet number per spike. As a result of the study, it is established that high positive correlation exists in the explored group of lines, which can be well proved, between spike length and grain number per spike, between spike length and grain weight per spike, between grain number per spike and grain weight per spike, as well as between grain weight per spike and 1000-grains weight. High negative correlation exists between yield and sterile spikelet number per spike.

Keywords: correlations; elements of productivity; spring six-row barley; yield

Date published: 2019-04-02