STUDY INFLUENCE OF THE YEAR ANG GENOTYPE WITH FIT MODEL OVER SIGNS-MARKERS OF COMMON WINTER WHEAT (TRITICUM AESTIVUM L.) CULTIVARS IN CONDITIONS OF SOWING IN OCTOBER
Abstract
The aim of the study was to establish the influence of the year and genotype at the sowing date in October, on morphological markers in cultivars of common winter wheat. The study period covers 2016/2017 to 2018/2019. The first year was dry; the second year was rainy with uneven distribution of precipitation. The third year was warmest with extreme rainfall in June. The experiment was performed in the experimental field of IRGR Sadovo on cinnamon-shaped resin in the South-Central region of Bulgaria. The climate is transitional-continental. Plant material is two cultivars of common winter wheat Pobeda and Boryna. The sowing was carried out in the optimal period for the region on October 20. The Least significant differences (LSD) were found using the JMP 5.0.1 program. (JMP release 5.0.1., SAS Institute Inc. Cary, NC). The signs-markers plant height, spike length; numbers of kernels per spike are influenced by the conditions of the year, as they give proven differences. The influence of the conditions of the year on the sign mass 1000 grains is weaker in the cultivar Pobeda, as no proven differences are observed. In the case of the Boryana cultivar, the mass 1000 grains is stable in the first two years, but has been proven to decrease in the third year.
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