LINE × TESTER ANALYSIS FOR ESTIMATION OF COMBINING ABILITY IN TOMATO

doi:10.12816/ejpb.2024.388858

LINE × TESTER ANALYSIS FOR ESTIMATION OF COMBINING ABILITY IN TOMATO

Document Type : Original research

10.12816/ejpb.2024.388858

Abstract

Hybrid development under Egyptian conditions is within tasks of Plant Breeding and Conservation Program of Desert Research Center (DRC). Eight genotypes (Five lines and three tasters) and fifteen F₁ hybrids of tomato were evaluated in season 2022/2023 at Baloza Research Station, DRC, North Sinai. The experimental design was randomized complete blocks design with three replicates. The results indicated that variances due to genotypes, parents, crosses and line × tester were significant for all studies traits, except TSS% in crosses. The highest value of yield per plant was recorded for L3 (2.87kg), T1 (3.27kg) and L2× T1 (5.10kg) in the lines, testers and crosses, respectively. The L1 proved to be good general combiner for all traits, except TSS%. The cross L1× T3 registered significant and positive SCA effects for plant height, fruit weight and yield per plant. Lines contribution was higher than tasters and line × tester interactions for most traits. All traits showed non-additive gene action, except TSS% which showed additive gene action. Additive and non-additive gene action were observed for yield per plant. Heritability estimates in narrow sense were low for all studied traits.

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