Genetics of resistance to ToLCV in tomato (Solanum lycopersicum L.)

Koteswararao Yadav, P.G. Sadhan Kumar, S. Nirmaladevi, Sally K. Mathew, T.E. George, S. Krishnan

Abstract


Genetics of ToLCV resistance was studied at College of Horticulture, Vellanikkara, Thrissur using the ToLCV resistant genotype IIHR 2195. Pusa Ruby (susceptible to ToLCV) was crossed with IIHR-2195 (resistant to ToLCV) to develop F1 population during September-December, 2009. The F1s were raised in the pots filled with sterilised media during Feb-2010. F1s were selfed to develop F2. Simultaneously, F1s were backcrossed to susceptible parent to develop B1. F1s were backcrossed to resistant parent to develop B2. Inheritance of resistance to ToLCV was studied using the parents, F1, F2, B1, and B2 populations of cross involving susceptible and resistant genotypes. The populations of six generations were screened for ToLCV resistance. The inheritance studies in six generations of cross combination Pusa Ruby x IIHR-2195 clearly revealed that the resistance to ToLCV in IIHR-2195 is controlled by a single dominant gene.


Keywords


Tomato leaf curl virus (ToLCV), Pusa Ruby

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A KAU publication [CODEN: JTAGEI; ISSN 0971-636X; eISSN 0973-5399]