Imparting root knot nematode resistance through grafting in tomato (Solanum lycopersicum L.)
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Date
2020
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Punjab Agricultural University, Ludhiana
Abstract
The present investigation was conducted at Vegetable Research Farm, Department of
Vegetable Science, Punjab Agricultural University, Ludhiana for “Imparting root knot
nematode resistance through grafting in tomato (Solanum lycopersicum L.)” during Autumn
season of 2015-2016 and 2016-17. The work plan was divided into three experiments based
on different grafting methods which further divided into two different sites i.e. infested with
root knot nematode and non-infested soil. Ten rootstocks with combination of two different
scions (Punjab Sartaj and Punjab Ratta) were used as experiment material. For infested plots
pure culture of nematodes were raised by taking galled roots of tomato plants from infested
plots than galls were teased and freshly hatched second stage juveniles were raised and used
for inoculums. It was observed that plant and fruit characters like plant height, fruit weight,
harvest duration, marketable yield as well as total yield increased in grafted plants over nongrafted
plants both in nematode free as well as Nematode infested plots. Further it was also
revealed that plants grafted with Tube graft method observed highest success rate and was
even responsible for earliness as well as high marketable yield in tomato plants. On
evaluation of rootstocks plants grafted on EC-119197 recorded highest plant height, higher
total and marketable yield, higher fruit weight and prolonged harvest duration both in
Nematode infested and nematode free plots. Whereas plants grafted on rootstock PNR-7
recorded early flowering as well as early picking in infested plots. Rootstock L-097 recorded
maximum fruit TSS while plants grafted on rootstock EC-119197 recorded maximum
pericarp thickness. No significant effect was observed when grafted and non-grafted plants
were examined for lycopene content. Overall rootstock EC-119197 can be used as a resistant
rootstock against root knot nematode in addition it can fetch higher yield and better fruit
quality.
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Citation
Sumeet Singh (2020) Imparting root knot nematode resistance through grafting in tomato (Solanum lycopersicum L.) (Unpublished Ph.D. Dissertation). Punjab Agricultural University, Ludhiana, Punjab, India.