EVALUATION OF SOME TOMATO GENOTYPES FOR DROUGHT TOLERANCE
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Date
2017
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Evaluation of some tomato genotypes for drought tolerance” was
carried out at laboratory and Vegetable Research Farm of the Department of Vegetable Science, Dr Y S Parmar
University of Horticulture and Forestry, Nauni-173 230, Solan (HP). This present study was divided into two
experiments and both experiments was laid out in Complete Randomized Design (CRD) Factorial In first
experiment, investigation was carried out to screen tomato genotypes response to drought at germination and
seedling growth parameter stages. These genotypes were screened with different osmotic concentration of
Polyethylene glycol (PEG-6000) at -0.295 Mpa and -0.491 Mpa, while their respective control treatments were
treated using distilled water for fourteen days. Germination percentage, germination rate, root length, shoot length,
seed vigour index-I and II, vitality index were computed to identify the most tolerant genotypes. The genotypes EC-
620434, Best of All, Marglobe and Arka Vikas were found best under drought stress as there was lesser reduction in
germination percentage, and in growth parameters such as root and shoot length as compared to other genotypes
studied. However, in second experiment, tomato genotypes were assessed under polyhouse condition, seedlings
were transplanted in polybags with the mixture of cocoa-peat, loamy soil and vermiculite in the ratio of 1:1:1.
Different level of moisture stress were imposed to genotypes, 100%, 75% and 50% of Etc. Stress were induced after
15 days of transplanting by estimating Etc value using pan evaporimeter and observations were recorded. Result
revealed that genotypes Best of All, Marglobe, Arka Vikas and LA-3846 were identified as the most tolerant to
moisture stress as there was lesser reduction in leaf area, root biomass, root and shoot length compared to other
genotypes under study. Based on the influence of both the experiments it is found that genotypes Best of ALL,
Marglobe and Arka Vikas were found tolerant against drought stress condition compared to other genotypes under
study.
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