Author(s):

Santosh Kumari, Arushi Khanna and BS Dogra

Abstract: Tomato is member of nightshade family, fruits are consumed as a vegetable and is beneficial to human health. Heterosis breeding is a tool used for improvement in tomato and developing good quality, uniform, high yielding hybrids having resistance/tolerance to disease and insect pest. It reduces the risk of heart diseases and cancer. Five diverse tomato genotypes were crossed in a diallel fashion (excluding reciprocals) during 2015-16 and in the next year i.e. 2016-17, ten crosses along with five parents and one standard check (Naveen 2000+) were evaluated in Randomized Complete Block Design with three replications. Analysis of variance depicted remarkable differences for different characters studied. Results revealed that maximum fruits per plant were recorded in the genotype Solan Lalima (26.81) followed by BT Best (24.67) and BT-10-12 (21.93) and among cross combinations, maximum numbers for the trait were recorded in Solan Lalima x BT Best (31.43) followed by Solan Lalima x BT-10-12 (22.86) and UHF-519 x EC-2798 (26.73). Solan Lalima x BT Best (17.22 %), UHF-519 x EC-2798 (10.16 %) and UHF-519 x BT-10-12 (4.21 %) were found best heterotic cross combinations over better parent. Highest average fruit weight was recorded in parent UHF-519 (74.17 g) followed by EC-2798 (73.07 g) and Solan Lalima (68.67 g) and six cross combinations showed significant heterosis over the better parent among which BT-10-12 x BT Best (17.32 %) showed the highest heterosis followed by UHF-519 x EC-2798 (12.27 %) and UHF-519 x BT Best (8.76 %). UHF-519 x EC-2798 (4.74 %) and UHF-519 x BT Best (1.47 %) showed significant positive heterosis over standard check. Maximum yield (kg/plant) was recorded in the genotypes Solan Lalima (1.64 kg), EC-2798 (1.57 kg) and BT Best (1.39 kg) and among cross combinations, UHF-519 x EC-2798 (2.03 kg) recorded maximum yield followed by Solan Lalima x BT Best (1.89 kg) and Solan Lalima x BT-10-12 (1.87 kg). Six cross combinations revealed highest positive heterobeltiosis being maximum in UHF-519 x EC-2798 (28.78 %). Cross combinations viz., UHF-519 x EC-2798 (15.77 %), Solan Lalima x BT Best (7.99 %), Solan Lalima x BT-10-12 (7.02 %) and Solan Lalima x EC-2798 (6.39 %) exhibited significant positive heterosis over standard check.

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