GENETIC-VARIABILITY AND HERITABILITY IN TOMATO (LYCOPERSICON-ESCULENTUM) GENOTYPES DURING SUMMER SEASON UNDER PLASTIC-HOUSE CONDITION

A study was conducted during 1991-92 at Jorhat to evaluate 29 genotype s of tomato (Lycopersicon esculentum Mill.) in relation to 8 different growth and yield-attributing parameters under plastic-house condition during summer-season. 'Vaishali' tomato recorded the maximum yield of 1.60 kg/plant followed by 1.34 kg/plant in the genotype 'Sutton Gram Prolific'. All the characters except branch number were found to be hi ghly heritable. High genotypic and phenotypic coefficient of variation , heritability and genetic advance as percentage of mean were estimate d for fruits/plant, fruit-setting percentage and average fruit-weight suggesting their importance in the selection programme of tomato impro vement.