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A solution culture experiment was conducted to screen out 16 Bangladeshi tomato germplasm for salinity tolerance with respect to severity of leaf symptoms, shoot and root dry matter production, fruit yield, shoot Na, K, Ca accumulation and their respective ratios by exposing up to 120 mM NaCl. The salinity tolerance scale ranged from 1.0 (most tolerant) to 3.5 (most sensitive). Based on the severity of leaf symptoms, “BT14 (BARI Tomato 14)” and “BHT5 (BARI Hybrid Tomato 5)” were found to be most tolerant germplasm to salinity with score 1.0. Reduction of dry weight was found to be 19% (shoot) and 15% (root) in BT14 and BHT5, 30 76% (shoot) and 27 83% (root) in other germplasm. Higher correlation was found between salinity tolerance scale classes and the reduction of shoot/root dry weight, Na concentration, K/Na, and Ca/Na ratios in BT14 and BHT5 germplasm. The fruit yield of BT14 and BHT5 germplasm was less and decreases with high salinity. Thus, “BT14” and “BHT5” can be regarded as a breeding material for development of new tomato varieties resistant to salinity. Introduction In Bangladesh the availability of vegetables is only about 20 per cent of the recommended requirement of 200 g/person/day. Average tomato production in the world is 26.29 t/ha, whereas in Bangladesh it is only 6.46 t/ha (FAO 2011). Siddiky et al., (2012) observed 13 tomato germplasm in a saline soil of Khulna, Bangladesh and recorded the fruit yield (60 t/ha) in 2 8 dS/m (non saline to moderate saline) but in 8.1 12 dS/m (moderately higher saline) yield was reduced 50%. In Bangladesh, coastal areas are about 2.86 million ha covering by 30% of the total crop land. Of this, nearly 1.056 million ha cultivable land are affected by varying degrees of salinity and 75% cultivated land (very low to moderate salinity) have scope for successful crop production (SRDI 2010). Increasing evidence suggests that plant species and varieties vary greatly in their resistance to salinity (Ashraf and Foolad 2007). The tomato plant is moderately tolerant to salinity stress (Ayers and Westcot 1989) although this sensitivity is dependent on the cultivar (Cramer et al. 1994). Plant breeding methods are time consuming, slow process, laborious and expensive approach and rely on existing genetic variability. Use of physiological selection criteria can improve the probability of success by making empirical selection more efficient (Noble and Rogers 1992). In this context, screening at the earlier stage can be an easier method to determine salt tolerant genotypes. The main objective of this study was to determine the salt tolerance of 16 tomato germplasm screening them on the basis of visual appearance and to evaluate the growth and yield traits under high salinity condition. *Author for correspondence: . Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh. Soil Science Division, Bangladesh Agricultural Research Institute, Gazipur-1701, Bangladesh.

Performance of tomato (Lycopersicon esculentum Mill.) germplasm to salinity stress