Gene Effects for Qualitative Trait using Three Testers in Tomato (Lycopersicon esculentum Mill.)

Three testers, BT-17 and PS-1 and there hybrid (BT-17 ??PS-1) were crossed to 15 inbred lines to develop the experimental material The modified triple test-cross analysis was applied to estimate additive (D), dominance (H) and epistatic component of genetic variance for ten quantitative traits of tomato.. Overall epistasis was important for number of seeds/fruit and number of locules/fruit for both the season except number of seeds/fruit in spring-summer season Significant estimate of both additive and dominance component were observed for all the characters except total soluble solids in both the season for additive and total soluble solids in autumn-winter season for dominant component. The F value was positive and significant for total soluble solids in autumn-winter season showing isodirectional nature of dominance. Significant of additive components and F parameter showing increasing effect on the characters, indicates that pedidree selection would be effective for improvement of such traits.