The results of the assessment of self-pollinated precocious lines of maize (Zea mays L.) on the main economically valuable traits at two sowing dates

Purpose. Comprehensive study, selection, evaluation and systematization of self-pollinated lines maize (Zea mays L.) obtained on the basis material diffe­rent genetic structure from endosperm flint dent were implemented according to main economically valuable traits precocity in order select best genotypes for selection. Methods. Hybridization, inbreeding used process creating initial material; visual method – phenological observations; laboratory field determine morphobiological characteristics maize; measuring weighing account harvest metric plants; mathematical statistical validity results, indicators trait variability, correlation dependence traits; analysis variance; comprehensive assessment most common germplasms. Results. As a result germplasms, it was revealed that highest level grain yield under both sowing periods Iodent germplasm; minimum moisture content Flint Mix germplasms; shortest average duration emergence flowering 50% male female inflorescences stage steadily high va­lues ​​of plant height germplasm optimal date, plasma late date. Steadily values ear insertion at dates based germplasm. The number precocious by germplasms identified. Conclusions. DK239 germplasm, DK7174, DK2285, DK305, DK2613, DK5568 DK2332 DK2659 traits. They are promising selection ultra-early hybrids adapted conditions Steppe Ukraine.