||The results of research of selection examples of Chicory Root productivity by the harvest of root crops, influence
of climatic conditions and dry matter and inulin content are given in the article.
Productivity of the selective examples of Chicory Root was studied in comparison with the conventionally accepted
standard – Yaroslavl sort 30. During five years, 392 examples were studied. The analysis of the crop capacity of 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 of studying, a similar distribution of the amount of roots by their crop capacity was observed.
The weight of the root of Chicory Root depends on soil and climatic conditions. In 5 years, an average weight reconstitutes
the genotypic character of the given feature, where 51,6% of 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 of uniformity of the given feature is significant and is 88,83% in average.
The coefficient of variation was used to assess the feature variability. The variation is considered to be weak if
ν<10%, medium if ν is 11–25%, and large if ν>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 mass” was average. Besides the root’s
crop capacity the great importance for the characteristics of roots’ selective examples have such features as dry matter and
The analysis of the data by the dry matter content showed that a significant percentage of 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% of the selective examples, which had a dry matter content of 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 of dry matter and exceeded the standard significantly were marked. Inulin content was measured per dry weight.
On average crop capacity of 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 of Chicory Root were
propagated for further selection.