Detection of resistance to Citrus tristeza virus (CTV) with molecular marker in some citrus hybrids

Turkey meets ecological desires of many plants that are not gene center, because of geographical location. Citrus that have nutritive properties and produced in large areas is a group of plants that can grow easily on the ecological conditions in our country. However, citrus cultivation is limited by biotic and abiotic factors like other herbal products. Tristeza virus which affects the citrus orchards around the world, has damaged citrus orchards, reducing the amount of production and decreasing the quality. This virus has been entered with infected graft materials in Turkey, but effective vector is not available in our country. Sour orange that used as citrus rootstock especially Mediterranean Region where production is performed intensively in our country, is susceptible to tristeza virus. In this study, hybrid plants that obtained from three different hybridization combinations formed by using Tristeza-resistant parent, were screened with 35 RAPD markers indicating the presence of the resistance gene. This study demonstrated utility of early selection markers for citrus rootstock breeding for resistance to tristeza virus in different population.