Evaluation of accessions of various ecological and geographical origin hybrid clover (trifolium hybridum l.) based on breeding indices

The assessment of samples of various ecological and geographical origin of hybrid clover based on selection indices was carried out on the experimental field of the Institute of Agriculture of the Carpathian Region of the National Academy of Sciences of Ukraine in accordance with generally accepted methods in 2016 - 2018.Field research, observations, counts and measurements were carried out in accordance with the guidelines for the study of the world collection of perennial forage grasses; calculation of variance, standard deviation and multiple correlations - according to Dospekhov.The object of research in the collection nursery of hybrid clover was 26 cultivars of various ecological and geographical origin.In order to identify the reliability of individual breeding indices and the possibility of their use and on the basis of structural analysis, the breeding indices were calculated according to V. M. Tishchenko: attractions (AI) - mass of heads per stem mass (M1 / M2); micro-distribution (Mic) - green mass per plant per number of stems (m3 / K); intensity (SI) - mass of stems per plant height (M2 / H). Two breeding indices were adapted to the culture of hybrid clover: foliage index (AI) - leaf mass per plant per plant weight (Ml / m3) and daily growth rate index (IDR) - plant height according to the interphase period, the number of days in the interphase period (H / Cd).The three-year average value of the attraction index in cultivars of hybrid clover was 0.20.The microdistribution index was 14.29.The leafing index on average over the years is 0.46.The average intensity index was 1.27.The average daily growth rate was 0.83.