63. Assessment of tomato germplasm against water deficit condition at seedling stage

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Nabeel Yaqoob, Asif Saeed, Muhammad Ahmad, Muhammad Hamza, Abu Bakar Munir Butt, Rujab Nadeem Amir Shakeel, Afaaq Tariq


Tomato (Solanum lycopersicum L.) is the second most widely cultivated vegetable crop worldwide. Drought is one of the most significant limiting factors that damage vegetable crops all over the world because of the effects of climate change. Drought stress causes abnormal metabolism, which can stop plant growth or damage the plant ultimately causing yield loss. In the present study, 20 genotypes were used for screening against drought stress by applying two treatments of water: normal with 100% field capacity and stress conditions with 50% field capacity. A research experiment was carried out with a completely randomized design (CRD) under factorial using two replications in the glasshouse of the Department of Plant Breeding and Genetics, University of Agriculture Faisalabad in 2021. Analysis of variance (ANOVA) was used to determine the significance of morphological data, which included plant height, root length, shoot length, number of leaves, number of branches, fresh shoot weight, fresh root weight, fresh root-shoot weight ratio, root dry weight, shoot dry weight, and total biomass. Among all genotypes, Zarnitza was considered the best genotype because it performed well under both control and drought conditions (100 and 50% field capacities, respectively) while tomato line “17858” was found drought susceptible genotype and performed poorly under drought. The genotype “Zarnitza” could be used in future tomato breeding programs to boost production.

Keywords: Biplot; Climate change; Genetic variability; Principal component analysis (PCA); Screening; Solanum lycopersicum (L.)


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