BASAL STERILITY OF WHEAT EARS - INDEX OF SENSITIVITY TO DELAYED SPRING FROZEN AND ITS RELATIONSHIP WITH YIELD AND PRODUCTIVITY ELEMENTS, IN THE CLIMATIC CONDITIONS OF 2020 YEAR AT ARDS CARACAL
The special climatic conditions manifested in the spring of 2020 at ARDS Caracal by the appearance of frosts delayed for 2 consecutive days, brought changes in the architecture of the wheat ear by the appearance of the phenomenon of basal sterility. For 200 wheat varieties of different origins (Romanian, French, Austrian, German, Swiss, mixed, hybrid wheat germplasm) the basal sterility manifested was determined at maturity. Ten ears of each variety / replication constituted the analyzed sample. Mixed germplasm (52 wheat varieties from all over Europe) had an basal sterility average rate of 11.4% - the lowest in the experiment. At the opposite pole was the German germplasm with an average percentage of 17.1%. The lowest amplitudes between the maximum and minimum valuesof basal sterility were recorded in hybrid wheat and Romanian germplasm (13.5-13.6%). The highest amplitude was recorded in the French germplasm – 19,1 %. The correlations performed highlighted the distinctly significant negative relationship between the basal sterility and the yield obtained; the significant positive relationship between yield and the note reflecting frost resistance; the significant negative relationship between the test weight and the days from 01.01 to heading date.
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