Lucrarea prezintă rezultatele cercetărilor privind modificarea formelormaterne ale hibrizilor simpli de porumb timpuriu prin intermediul incrucişărilor inruditeAxA1 şi backcrossate (A x B) xA/ (A xA1) xA.Hibrizii cu incrucişări inrudite prezintă avantaje la rentabilitatea producerii de seminţe şi la performanţele agronomice, uniformitatea plantelor, fiind competitivi cu variantele simple. Utilizarea incrucişărilor backcrossate ca forme materne are ca avantajmajorarea variaţiei caracterelor morfologice esenţiale.

The paper presents the results of researches on modifying the maternal forms of early single cross maize hybrids through inbreedingA x A1 and backcrossing (A x B) x A/ (A x A1) x A. The hybrids obtained by inbreeding have advantages in seed production, agronomic performance, uniformity of plants, being competitive with simple variants. The use of backcrosses as maternal forms has as advantage the increased variability of essential morphological traits.