Phookan, Deepa B.Gyadi, Suni2023-10-062023-10-062018https://krishikosh.egranth.ac.in/handle/1/5810198529A field investigation was carried out under naturally ventilated polyhouse in the Experimental Farm Department of Horticulture, Assam Agricultural University, Jorhat-785013 during 2017-18. The objective of this investigation was to study the relative performance of cherry tomato varieties under naturally ventilated polyhouse. The experiment was conducted in Randomized Block Design replicated for three times. There were twelve varieties of cherry tomato viz., Roja, Laila, Sheeja, Ruhi, Cherry tomato red, Cherry Tomato Yellow, Lara, Sweet Bite, Yellow Pear tomato, Garden’s Delight, Pusa Cherry-1 and Meghalaya local in this study. Growth and yield attributing traits such as plant height, branch number, days to 50% flowering, flower number, fruit number, fruit weight etc. were recorded. The highest plant height of 5.01m was recorded in Laila and branch number was recorded in Meghalaya local (8.33) followed by Pusa Cherry-1 (8). Roja took least number of 25.69 days and 31.74 days for 50% plants to flower and 50% plants to set fruits respectively. The highest number of flowers cluster-1 was recorded in Pusa cherry-1 (44.51) followed by Sheeja (17.85). Similarly, the highest number of fruit plant-1 was recorded in Sheeja (234.87). Among the varieties, Sheeja took the least days to first harvest (82.37days). The highest harvest latitude was found in the variety Lara (97.33 days). The highest fruit set per cent of 97.91 was found in Sweet Bite followed by Laila (96.52%). Among the varieties, Lara had recorded the highest number of fruiting clusters plant-1 of 29.00 followed by 24.50 in Roja. Fruit shape index of 1.54 was recorded in Laila followed by 1.44 in Sweet bite.The highest TSS (7.10%) was found in Roja followed by Laila (6.42%) while the ascorbic acid content was found highest in Cherry Tomato Red (33.60mg 100g-1) followed by Pusa Cherry-1 (31.2mg 100g-1). Titrable acidity was found highest in Roja (0.37%) followed by Sweet Bite (0.32%). Significantly thicker pericarp of 0.38cm was recorded in the variety Sheeja followed by 0.36cm in Sweet Bite. Laila had the highest carotenoids content of 34.79μg/g.The highest yield of 60.90t ha-1 was recorded in the variety Lara followed by 60.00t in Ruhi. The cherry tomato varieties Lara, Ruhi and Roja outperformed other varieties in terms of yield when grown under NV polyhouse. With respect to quality parameters, varieties Lara and Ruhi were found to be promising as they recorded high value of TSS, Ascorbic acid, Acidity and Sugars which can be better exploited in the processing industry. Economics of Cherry tomato cultivation showed that the highest B:C of 2.56 was found in Lara followed by 2.49 in Ruhi.EnglishThesis