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Incorporation of drought tolerance in tomato and evaluation of RILs (F6)

About 184 F6  tomato plants of the cross involving large fruited HT line (CLN 3125A) and drought tolerant (RF4A) line were raised and screened for drought tolerance during rabi 2015. Response of these RILs was evaluated under water stress imposed by withholding watering from 40 DAS for 15 days. The yield parameters were observed in the plants where stress was imposed. Per plant yield ranged from 0-1000 g in the RIL’s. Fifteen RILs recorded high yield per plant (>700g) when compared to the drought tolerant parent RF4A (650 g), while the drought sensitive variety Arka Saurabh recorded the least yield (50 g). Three progenies, R X A F2-38-2-2-2, R X A F2-118-2-1-1 and R X A F2-149-2-1-1 recorded 1 kg per plant.


For advancement, all 184 F6 plants were raised during rabi 2015 under normal growing conditions. Based on horticultural traits, 9 lines were selected from the RILs of R X A (F6) to evaluate for heat and drought tolerance during 2016-17. Two plant selections viz; R X A F2 - 177-2-1-1-1 and R X A F2 - 22-1-1-1-1 responded better under drought condition in tolerance based on physiological studies. Seeds were collected from 155 F6  plants for further advancement during summer 2016.


F2- 3-1-1-2-1                         F2- 177- 2-1-1-1                      F2- 160-2-2-2-2

 

   
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