Stability Studies in Processing Tomato (Solanum lycopersicum L.) Genotypes

Thirteen genotypes along with two checks of processing tomato were evaluated in Randomized Block Design (RBD) with three replications to study the stability of genotypes under three diverse environments, the environments include three seasons’ viz., kharif (2013), rabi (2013) and summer (2014) and were analysed by Eberhart and Russell's model (1966) to identify the most stable varieties. Genotypes PTR-1, PTR-4, PTR-6 and Arka Ashish could be considered as the most stable genotypes for yield. Further these were found well adaptable to all the three environments as they exhibited regression coefficient (bi) value nearer to unity, mean yield higher than the population mean and has nonsignificant deviation from regression. PTR-8 and PTR-10 had regression co-efficient (bi) value nearer to unity with non significant deviation from regression and had mean yield value below population mean, thus indicating average stability and poor adoption to all the three environments. Whereas, genotype PTR-7 exhibited mean yield as same as population mean with regression coefficient value (bi) more than unity and thus is an average stable genotype. All the genotypes were found stable for total acidity except PTR-7, whereas PTR-1, 4, 5, 6, 9, 10 and Arka Ashish for TSS.