Morphological and Commercial Characters of Brussels Sprout Androgenic R2/R3 Generations and Experimental F1 Hybrids
In the years of 2005-2007 twelve Brussels sprout androgenic lines of R2 and R3 generations derived from four commercial cultivars: Ajax F1, Diablo F1, Icarus F1, Philemon F1 were evaluated according to marketable yield, plant height, intraline uniformity and other morphological traits important for the breeding. In 2007 twelve single F1 hybrids obtained by the use of androgenic lines were also evaluated in comparison to their parental components. Evaluation showed extended diversity of morphological (plant height, shape of the head, uniformity) and agroeconomical characters among the tested lines. Nine lines showed good intraline uniformity and stability in R2 generation. After selection all tested lines of R3 generation were uniform. Experimental F1 hybrids showed intraline homogeneity, high yield similar to Diablo and Philemon F1 control cultivars and morphological characters typical for good quality commercial Brussels sprout. Some level of inbreeding depression among androgenic lines was observed in comparison to their donor cultivars, while experimental F1 hybrids showed significant effect of heterosis.