Evaluation of AVRDC advanced lines of long-shelf-life tomato in the Terai region of Nepal
2017
Rawal, R. | Gautam, D. M. | Gautam, I. P. | Khadka, R. B. | Tripathi, K. M. | Hanson, P. | Acedo, A. L. Jr | Easdown, W. | Hughes, J. A. | Keatinge, J. D. H.
Tomato is one of the leading commercial vegetables grown widely in the plains and hills of Nepal. In the Terai (plains) region, tomato is cultivated in the rainy and winter seasons. Productivity is very low, averaging at 13.5 t ha‑1. A primary reason is the lack of appropriate, high-yielding varieties with multiple traits including good shelf life. This study evaluated nine advanced lines of tomato with long shelf life from the AVRDC - The World Vegetable Center (CLN3940, CLN3948, CLN3946, CLN3953, CLN3961, CLN3947, CLN3949, CLN3954 and 'Tanya') and a local cultivar ('Pusa Ruby') as control under field conditions in Nepalgunj, Banke, Nepal, during the 2014-2015 winter seasons. AVRDC's recommendations for field trials and cultural management were followed. Disease resistance and fruit yield, quality and shelf life differed widely with tomato line. CLN3940 was resistant to late blight, was least affected by virus diseases, and produced the biggest fruit (124.3 g fruit‑1) and highest yield (113.3 t ha‑1). The local control had the highest vitamin C content, titratable acidity and pH both at harvest and at the end of shelf life at ambient conditions but had the highest weight loss during storage. CLN3940, CLN3947, CLN3948 and CLN3953 had a shelf life of 8-10 days longer than that of the control. Similarly, their yields were 22-80 t ha‑1 higher than that of the control, in addition to their multiple disease (late blight, septorial blight and viral diseases) resistance trait. These four promising lines could be further tested in advanced field trials.
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