Mode of inheritance of dry matter content in onion (Allium cepa L.) bulb

Abstract

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 F1 and F2 generation offspring. Field trial including parents and F1 and F2 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 F1 and F2 generation. Additive genetic component value was higher than dominant for both F1 and F2 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 F1 hybrid. Neither general nor special combining abilities were significant for F2 generation.

Sadržaj suve materije je izuzetno važan sa aspekta dehidratacije crnog luka u prehrambenoj industriji. U cilju ispitivanja načina nasleđivanja ove osobine izvršeno je ukrštanje između pet divergentnih genotipova crnog luka, različitog geografskog porekla. Primenjen je metod punog dialela bez recipročnih ukrštanja, radi dobijanja potomstva F1 i F2 generacije. Poljski ogled sa roditeljima i hibridima F1 i F2 generacije postavljen je po slučajnom blok sistemu u pet ponavljanja u Institutu za povrtarstvo, Smederevska Palanka. Najčešći način nasleđivanja bilo je intermedijarno posmatrano u obe generacije ispitivanja. Vrednost aditivne genetičke komponente je veća od dominantne u oba analizirana generacijska nivoa (F1 i F2), što ukazuje da veći deo genetičke varijabilnosti pripada aditivnom delovanju gena. Najveća vrednost za heterozis (11,85%) izračunata je kod hibridne kombinacije PR x BB. Signifikantne vrednosti OKS su izračunate kod tri linije, a PKS kod jednog F1 hibrida. U F2 generaciji nisu utvrđene signifikantne vrednosti.