Mode of inheritance of dry matter content in onion (allium cepa l.) Bulb

Abstract

Pavlovic N., D. Cvikic, J. Zdravkovic, M. Mijatovic and M. Brdar-Jokanovic (2011): Mode of inheritance of dry matter content in onion (A. cepa L.) bulb. - Genetika, Vol 43, No. 1, 19 -27. Onion dry matter content is very important in terms of processing. The study was undertaken in order to investigate dry matter content inheritance pattern in fresh onion bulb. Five divergent onion genotypes, originating from different geographical areas, have been crossed. Full diallel crossing method (without reciprocals) was applied in order to obtain F-1 and F-2 generation offspring. Field trial including parents and F-1 and F-2 hybrids was performed at the Institute for Vegetable Crops experimental plot, Smederevska Palanka. The trial was conducted in randomized blocks, with five replications. Intermediate inheritance pattern prevailed for both F-1 and F-2 generation. Additive genetic component value was higher than dominant for both F-1 and F-2 generation, which implies additive effect of genes. Hybrid combination PR x BB was characterized by the highest heterosis value (11.85%). Better general combining abilities were confirmed for three lines in comparison with other lines, whereas special combining abilities were significant for one F-1 hybrid. Neither general nor special combining abilities were significant for F-2 generation.