Singh, J.P.Thapliyal, Alok2016-09-262016-09-262008-08http://krishikosh.egranth.ac.in/handle/1/78820Thesis-PhDThirty three genotypes of tomato were evaluated in Randomized Block Design (RBD) with three replications to study the stability behaviour of tomato genotypes at Vegetable Research Centre, Pantnagar under three environmental conditions (summer and winter of 2006 and winter of 2007) for thirteen characters namely, plant height, number of primary branches per plant, days to 50% flowering, number of flower clusters per plant, days to 50% fruit set, days taken to first harvest, days taken to last harvest, average fruit weight (g), locules per fruit, number of fruits per plant, weight of fruits per plant, fruit yield (q/ha) and TSS (%). The analysis of variance revealed the presence of genotype-environment interaction for ten characters namely, plant height, days to 50% flowering, number of flower clusters per plant, days to 50% fruit set, days taken to first harvest, days taken to last harvest, average fruit weight (g), fruit weight per plant, number of fruits per plant and yield (q/ha). The linear component of G × E interaction were highly significant for days to 50% flowering, number of flower clusters per plant, average fruit weight, fruit weight per plant, number of fruits per plant and yield (q/ha), The non-linear component of G × E interaction were highly significant for plant height, days to 50% flowering, number of flower clusters per plant, days to 50% fruit set, days taken to first harvest, days taken to last harvest, average fruit weight (g), weight of fruits per plant, number of fruits per plant and fruit yield (q/ha). The deviation from regression was significant for most of the genotypes for plant height, days to first harvest, days to last harvest, fruit weight per plant, number of fruits per plant and yield (q/ha). Two genotypes namely, Ajeet-11 and VR-20 were adjudged superior and also stable for the character mean fruit weight. For number of fruits per plant, BCTH-62, BSS-437, KS-227, KS-229 and Pant T-7 were found to be suitable for high yielding environments. For yield (q/ha), Ajeet-11, PTH-68, BSS-571, HATH-9, Pant T-8 and Pant T-7 appeared promising under favorable environment. The genotypes Aruna, ATL-02-39, Pant T-7 and Pant T-10 were found promising for TSS (%) over a wide range of environments. The genotype Pant T-8 and Pant T-7 was found most stable with regards to yield. Despite of yield Pant T-8 also showed stability for fruit weight per plant, however, Pant T-7 showed stability for another yield attributing character i.e., number of fruits per plant. Similarly, the genotypes CLN 2413R and CLN 2026M also exhibited stability for two important yield contributing traits i.e., mean fruit weight and fruit weight per plant.enstability, growth analysis, tomatoes, Solanum lycopersicum, genotypes, horticultureThesis