||At the present stage of the development of breeding science, inbred lines are the main source for creating new genotypic combinations for various breeding programs. In our studies, the decision to include the source material in the programs for creating hybrids was made taking into account the variability of inbred lines for individual characters and the manifestation of their productive potential.
Regarding crop yields, statistical characteristics indicate that the variance (S2 = 0,68) is low, which means that the inbred lines included in the collection do not respond significantly to fluctuations in growing conditions by changing yields. At the same time, a small (V = 4,96 %) variation in the length of the period from seedlings to full ripeness and the number of leaves on the main stem (V = 7,73 %) indicates that the collection is even in these indicators. The small variability of grain moisture indicators during harvesting (S2 = 8,76; V = 12,6 %) indicates the prospects of this criterion, as additional, in assessing the early maturity level of the studied material.
Depending on the genotype and weather conditions of the year, there was a significant variation in the signs of “damage by the corn moth”, “lodging of the stem” and “fragility of the stem”. The highest variation coefficients in yield were observed in inbred lines 273, 331, 489, and 7/7. High rates of variability indicate insufficient stability of these inbred lines, which means insufficient homeostasis. Such lines can be used to create intense heterotic hybrids for growing under conditions close to optimal.
It was established that the inbred line 331, the most stable in all respects except yield, with a coefficient of variation of not more than 10 %. It can be used to create intensive heterosexual hybrids despite varying yields, which is V = 23,33 %. can be explained by extreme growing conditions