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Ninety F1 hybrids obtained by diallel cross involving ten tomato
genotypes displayed wide range of variation and heterosis for ten
characters studied. Heritability was the highest for no. of
fruit/cluster, fruits/plant, fruit yield/plant and no. of
seeds/fruit. The highest genetic advance and genetic advance
expressed as percentage were recorded for the characters no. of
fruits/plant and no. of seeds/fruit. The genetic advance,
coefficient of variability and heritability indicated that
selection of superior parents based on these characters might be
effective in hybridization programme to develop high performing
tomato hybrids. Combining ability analysis showed that yield and
yield component characters were found to be controlled by both
additive and non-additive genes. Good combiner genotypes Japany,
Epoch, Namdahri, Ratan and Legend possessed mostly dominant genes
for all the characters. For QTL analysis F2 population was
developed from a cross between two tomato genotypes Dynasagor and
Bari-4. Five QTLs were identified with fruit yield/plant. Of five,
three QTLs were contributed by the parent Dynasagor and two were
contributed by parent Bari-4.
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