N. Petrovska*, V. Valkova Maize Research Institute, 5835 Knezha, Bulgaria (Manuscript received 14 May 2018; accepted for publication 14 September 2018) Abstract. The article presents the biological and morphological parameters of the new grain maize hybrid from middle early group. The

Abstract. The general combining ability (GCA) and specific combining ability (SCA) of twenty-six middle early maize lines was studied by Savchenko’ method. The lines were tested on three testers, with origin of two genetic groups: ХМ 98 40 and КС 05 7 of SSS и ХМ 87 15 of Lancas

V. Valkova Abstract. General Combining Ability (GCA) and Specific Combining Ability (SCA) of sixteen newly stabilized early maize lines were evaluated by Savchenko’s method (1978). The lines were tested in five testers by different genetic groups, possessing established high gen