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    Recent development in molecular markers system for disease resistance in Tomato
    (Research Journal Biotechnology, 2019) Qurat-ul-ain, Sajid; Eminur, Elci
    Tomato (Solanum lycopersicum L.), is an important vegetable crop included in Solanaceae group and is extensively growing vegetable all over the world and a vital source of vitamins A and C. According to the data calculated in 2017 about 370168 hg/ha tomatoes were grown worldwide with the production quality of 182,305,395 million tons of tomatoes annually (1). Tomato is also considered as a dynamic ideal crop to study the biology and plant behavior, particularly ecology, biotic stress factors, fruit biology and plant-microbe interaction. Molecular markers are increasingly used for several resistance genes especially for disease resistance. Molecular markers in tomatoes have improved recognition, mapping, classification and allocation of vital characters like disease resistance etc. Due to the limited sources of cultivated tomatoes, their wild relatives take part in the development of resistance sources against disease or pathogens as well to develop new cultivars. In this review, we are mainly discussing already detected molecular marker system those are developed for biotic resistance in tomato plants including viruses, bacteria, fungi and nematodes. The main purpose of this review is for tomato resistance genes related defense of plants against certain biotic stress factors that lead to the selection of superior plant sources for breeding of tomatoes.