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Abstract
Current study is emphasizing on the estimation of heterosis for different yield attributing traits and adaptability of tomato hybrids. It was performed in the research area of VCRP, HRI, NARC Islamabad during 2018-2019. Crossing was completed among six parents followed by line × tester. The analyzed data depicted significant differences (P ≤ 0.01) among all the characters.Due to desirable high negative heterotic values hybrids Peto-86 × Nagina and Riograndi × Roma were found suitable for breeding early maturing hybrids. For plant height maximum positive heterosis was observed in Riograndi × Nagina, for no. of cluster/plant in Naqeeb × Roma, for traits like flower cluster-1, fruit cluster-1, fruit length & width and single fruit weight in Naqeeb × Continental while for yield Riograndi × Continental showed maximum heterosis. Therefore among 9 tested hybrids Naqeeb × Continental was found to be highly preferable and recommended for utilization in different breeding programmes.
Highlights
Tomato (Solanum lycopersicum L., Solanaceae), one of the most important vegetable crops in the world, has a chromosome number of 2n = 24 and is largely selfpollinated in nature
In Pakistan, tomato is consumed on a daily basis cooked with meat, pulses, and vegetables, processed into ketchup, or used in fresh salads (Ramzan et al, 2014)
Material and Methods This study was conducted at the experimental site of the Vegetable Crops Program at the Horticultural Research Institute (HRI) of the National Agricultural Research Center (NARC) in Islamabad, Pakistan from 2018‒2019
Summary
Tomato (Solanum lycopersicum L., Solanaceae), one of the most important vegetable crops in the world, has a chromosome number of 2n = 24 and is largely selfpollinated in nature. Tomato is grown in most climate regions (temperate, tropical, and subtropical climates) of the world. Lower yields have become an increasingly important issue as global tomato consumption increases. Tomato is preferred by consumers for its high nutritional value and can be used in diverse ways. In Pakistan, tomato is consumed on a daily basis cooked with meat, pulses, and vegetables, processed into ketchup, or used in fresh salads (Ramzan et al, 2014). Tomato is a rich source of lycopene and other antioxidants and its consumption has been linked to a reduction in the risk of cardiovascular diseases and osteoporosis and increased skin protection from ultraviolet light-induced damage
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