Genetic and Phenotypic Variability in Some Broccoli (Brassica oleracea L. var italica Pl.) Hybrids

K. MIHOV1 and G. ANTONOVA2
1 Agricultural University, BG-4000 Plovdiv, Bulgaria
2 Institute of Horticulture and Canning, BG-4003 Plovdiv, Bulgaria

Abstract

Mihov, K. and G. Antonova, 2001. Genetic and phenotypic variability in some broccoli (Brassica oleracea L. var italica Pl.) hybrids. Bulg. J. Agric. Sci., 7: 157-160

The purpose of the present investigation is to determine the variability and its components for eight morphological characteristics in some broccoli (Brassica oleracea L. var. italica Pl.) hybrids. The hybrids Beaufort F1, Sumosun F1, Skiff F1, Neptune F1 and Tribute F1 have been tested in the period 1997-1999. Significant differences between the investigated genotypes and the years, which affect the variance of the morphological characteristics, have been established. The highest genotypic coefficient of variation – 38.08 %, has been established for curd diameter, and the lowest – 9.03 % – for the diameter of the leaf rosette. Hereditability is with high values for the diameter of the leaf rosette (89.91 %) and the number of rosette leaves (99.05 %). Genetic advance varies from 3.24 % for stem weight to 165.64 % for curd diameter. Using the characteristics curd diameter as a breeding index, assuring an effective breeding process is perspective.

Key words: Brassica oleracea L. var. italica Pl., genetic and phenotypic variance, heritability, genetic advance