REFFERENCE OF SELECTION SOURCE MATERIAL OF CHICORY ROOT FOR THEIR PRODUCTIVITY

Abstract

The results o f research o f selection examples o f Chicory Root productivity by the harvest o f root crops, influence o f clim atic conditions and dry matter and inulin content are given in the article.Productivity o f the selective examples o f Chicory Root was studied in comparison with the conventionally accepted standard - Yaroslavl sort 30. During five years, 392 examples were studied. The analysis o f the crop capacity o f the Chicory Root selective source material showed that during five years, on average 32,4% examples had a root crop capacity lower than the standard, 35,9% were equal or close to the standard and 31,8% significantly exceeded the standard in 10 or more percent. Over the years o f studying, a sim ilar distribution o f the amount o f roots by their crop capacity was observed.The weight o f the root o f Chicory Root depends on soil and clim atic conditions. In 5 years, an average weight reconstitutes the genotypic character o f the given feature, where 51,6% o f examples had the weight to 200 g and 33,3%, respectively, to 300 g with the reduction of examples with greater weight and deviation between extreme forms from 96,7 to 484,7 g. Coefficient o f uniformity o f the given feature is significant and is 88,83% in average.The coefficient o f variation was used to assess the feature variability. The variation is considered to be weak if v<10%, medium if v is 11-25%, and large if v>25%. Over years of research, except 2011 and five years on average, the variation coefficient was less than 25%. In other words, feature volatility "of root m ass" was average. Besides the root's crop capacity the great importance for the characteristics o f roots' selective examples have such features as dry matter and inulin content.The analysis o f the data by the dry matter content showed that a significant percentage o f selection examples were in the range of 3,6±0,03, but the variation was between 23,8% and 28,7%, depending on the selection of examples processing. It was allocated 6,8% o f the selective examples, which had a dry matter content o f 27,0-29,0%, which makes it possible to conduct selection to their content increasing. Among the studied selection examples, some examples which had increased content o f dry matter and exceeded the standard significantly were marked. Inulin content was measured per dry weight.On average crop capacity o f Chicory Root roots by 96 selection examples was 39.8 t/ha with deviation from 39,0 to 40,6 t/ha, inulin content was 18,2±0,6% with deviation from 17,6% to 18,6%. Inulin content in the selection examples is within 65,6±3,0% with deviation from 50,1% to 71,2%. The studied results make it possible to conduct source material selection which have roots' high crop capacity, high dry matter and inulin content. The best examples o f Chicory Root were propagated for further selection.