The breeding-testing program aiming at obtainment of the newest ideotype of white-prained winter wheat, mainly to meet the needs of eastern regions of this country is realized for several years. This is not only the answer for the current social demand, but also an offer for the food industry /excellent breakfast flakes/. The results of statistical analysis of five complex hybrid populations of F₅ are presented in the paper. The donor of the white grain trait were 3 lines of different age. It was tried to ensure an advantageous level of other economically significant traits by including into the program of crossings the varieties: Mironovskaya 808, Maris Huntsman and winterhardy fertile line from the USSR. Routine biometric measurements in 100 plants of each population were performed. The calculated coefficients of phenotypic correlation formed somewhat differently for each of five combinations. That is the 3-component combination involving the Maris Huntsman variety and two var. albidum lines, which can be of interest for further practical breeding.
The respective investigations were carried out by the Department of Plant Genetics and Breeding, Agricultural University of Lublin, in 1982-1983. Variability and heritability in the population of 89 hop plants bred for the earliness trait were determined. The highest heritability has been found for the content of alpha-acids /h² = 0.77/. length of lateral shoots /h² = 0.59/ and growth period length /h² = 0.54/. Inheritance of the remaining six traits lay within the limits of 0.22-0.43.