MORPHOLOGICAL MARKERS OF COMMON WINTER WHEAT AND ELEMENTS OF THE SEED YIELD IN CONDITIONS OF SOWING IN OCTOBER

Bogdan Bonchev

Abstract


The purpose of the present study is to determine the effect of sowing period on morphological markers of common winter wheat varieties and the relationship with the elements of seed production. The survey period covers the vegetation’s years 2016/2017 to 2018/2019. The highest deviation was observed in the average monthly temperatures in January, with a tendency of an increase in the maximum average temperatures in the months of June and July in the range 27.2 to 30.3°C. The most significant month amount rainfall maximum for the study period is in June 2019, which is of elemental nature. Vegetable material for the study is the cultivars of common winter wheat Pobeda and Boryana. The following analyzes were performed: variation analysis, indicator of accuracy, analysis of the variance of the studied traits, the power of influence of the factors was calculated, correlation analysis, multiple step regression analysis, Path coefficient analysis. Seed production of common winter wheat cultivars Pobeda and Boryana in October is mainly based on the number of productive tillers per m² and plant height. Plant height, spike length, and number of grains per spike have the highest influence of genotype in variance analysis. The signs of plant height and spike length in the studied varieties of wheat were confirmed as morphological markers. The number of grains in a spike can be used as an additional marker.

Keywords


wheat cultivars, seed yield, morphological markers

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