Vol. 7, Issue 3 (2019)
Evaluation of F1 hybrids of tomato (Solanum lycopersicum L.) and mechanism of resistance against root knot nematode (Meliodogyne incognita)
Author(s): Dumpala Swetha, PR Kamalkumaran and P Vetrivelkalai
Abstract: Tomato is mostly affected by root knot nematode (Meliodogyne incognita) which primarily produces root galls in the root system and cause 32 to 40% yield losses. Development of hybrids with nematode resistance as well as high yielding is very much needed to combat the effect. The present study is aimed to screen the F1 hybrids and its parents of tomato along with susceptible (PKM 1) and resistant check hybrid (Hisar Lalit) based on the nematode multiplication and induction of defence related enzymes by the resistant plant due to nematode attack. Six F 1 hybrids and their parents are screened, among them, two F1 hybrids Akra Abha×HN2 and LE 812×HN2 are found to be resistant with root knot index of 1.60 and 1.80 respectively. The resistant mechanisms are also supported with highest induction of defence enzymes viz., phenol, peroxidase, polyphenol oxidase and IAA oxidase activities in the hybrids Akra Abha×HN2 and LE 812×HN2 compared to susceptible check (PKM 1) and on par with resistant check hybrid (Hisar Lalit).
Pages: 252-255 | 1274 Views 283 Downloads
download (7853KB)
How to cite this article:
Dumpala Swetha, PR Kamalkumaran, P Vetrivelkalai. Evaluation of F1 hybrids of tomato (Solanum lycopersicum L.) and mechanism of resistance against root knot nematode (Meliodogyne incognita). Int J Chem Stud 2019;7(3):252-255.
