author(s)
Rajasri Mandali and K Vijayalakshmi

abstract
Field screening studies were conducted with 34 tomato genotypes against Tomato leaf curl virus disease under experimental fields of Seed Research and Technology Centre, Hyderabad, India. All the tomato genotypes were evaluated for their genetic diversity with respect to morphological and biochemical characters. A wild accession, EC-251672 exhibited highly resistant reaction (0%) to ToLCV with no visual symptoms of disease incidence when screened under field conditions. Nine private tomato hybrids viz., Akash-918, NS-539, NS-515, Siri-9005, STH-803, STH-807, To-1827, US-1196, US-2175 and one tomato variety Vybhav showed resistant reaction (1-20% incidence) while all Arka varieties under study from IIHR, Pusa hybrid-1 and susceptible check Punjab chuhara (100%) were found be highly susceptible to ToLCV. The wild genotype EC-251672 possessed narrow hirsutum type of leaves, glabrous plant surface and high phenol content was found to be resistant to whitefly vector and ToLCV disease. The phenol content of tomato genotypes showed significant negative correlation with the ToLCV disease incidence. Hence this wild tomato source can be used in the development of future molecular breeding programmes against ToLCV in tomato.