INHERITANCE OF HEAD WEIGHT AND OTHER AGRONOMIC CHARACTERS IN CHINESE CABBAGE (BRASSICA CAMPESTRIS SSP. PEKINENSIS)

Authors:	S. Rifei, N. Xinke
Abstract: Inheritance of ten characters including head weight was studied in a 9X9 dialell cross of chinese cabbage. The parental material included nine inbred lines. Head weight showed highest heterosis, 60.27% higher than the mid-parent value and 42.91% higher than the high parents. Heterosis for blade-midrib ratio and midrib length was lower than the high parents. Correlation coefficients between F1 hybrid performance and midparent value for all characters were significant. Additive and dominance gene effects were important for all characters except additive component of blade-midrib ratio. Dominance was partial for head diameter, blade-midrib ratio, midrib length and midrib thickness. Head height and leaf length showed complete dominance whereas head weight, leaf number, leaf width and midrib width exhibited overdominance. Head weight was found to be controlled by at least four genes. Heritability estimates were high for blade-midrib ratio (71.34%), midrib length (69.82%), head height (69.25%), head diameter (66.20%), leaf length (61.69%) and low for head weight (19.65%).
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