"Maritsa" Vegetable Crops Research Institute, BG-4003 Plovdiv, Bulgaria
KALAPCHIEVA, S., 2007. Combining ability of garden pea varieties and lines through the vegetation period prolongation. Bulg. J. Agric. Sci., 13: 423-431
Analysis of combining ability of garden pea (Pisum sativum L.) five varieties and one breeding line was made through the vegetation period prolongation and its phenophases. It was establish that non-additive and additive gene effects exerted influence for inheritance of the studied phenophases prolongation and the entire vegetation period. Line 973 and Mira variety possessed good general combining ability for breeding of genotype with a long vegetation period. Parent forms Atiroy and Musala were distinguished for low total combining ability, but for high variation of specific combining ability allowing their separated combining to be successfully used for early-maturing breeding.