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Identification of stress tolerant tomato genotypes for north eastern hill ecosystem

 

   

 

 

Rainfed horticulture system

Tomato genotypes (24 nos.) were evaluated for their relative germination rate (RGR), relative germination energy (RGE), relative germination index (RGI), relative vitality index (RVI) and relative PEG injury rate under in-vitro drought condition induced by application of PEG @ 30g/l of water.


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High temperature stress tolerance in tomato

 

Two hundred forty three recombinant inbred lines (RILs) of tomato (Punjab Chhuhara × H-88-78-1) were tested in open field conditions during February to May, 2015. Based on fruit setting percentage (< 20% - highly sensitive, 20-40% - sensitive, 40-60% - moderately tolerant, 60-75% - tolerant and > 75% - highly tolerant), 12 lines were categorized in 5 groups. Out of 243 RILs, genotype PR-168, PR-161-L and PR-193-2 performed better under high temperature condition (day max temp. > 38°C) on the basis of morphological, physiological and fruit quality traits.

 

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In Yagantipalli village of Banaganapalli mandal in an area of 10 acres, farmers used to irrigate the entire orchard by basin method of irrigation with field channels, which took 12 days to irrigate entire orchard. Drip irrigation was installed with double lateral having four drippers of eight lit/hour discharge on each side of the tree.


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High value cash crop under protected cultivation

The Chhoel–Gadauri village of Kullu district experience low temperature and frost during Dec to Feb, which results into delayed nursery production of tomato under open conditions and causes heavy mortality of seedlings. This ultimately delays the transplanting which results into heavy crop loss due to heavy rainfall in July, high incidence of diseases and short duration of the cropping.


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