Tomato wild relatives are important sources of resistance to many pests of cultivated tomato [Solanum lycopersicum L. (syn. Lycopersicon esculentum Mill.)]. Eleven wild tomato accessions previously identified at the World Vegetable Center as resistant to Bemisia tabaci were evaluated for resistance to the two-spotted spider mite [Tetranychus urticae (Koch.)] Resistance to T. urticae based on the number of eggs from the no-choice bioassays was positively correlated with density of type IV glandular trichomes and negatively correlated with densities of type V trichomes. All resistant accessions accumulated high levels of total acylsugars, which were positively associated with type IV trichomes.
The tomato leaf miner (Tuta absoluta) is making inroads in Tanzania and other locations in East Africa. The World Vegetable Center and partners are working to develop strategies for farmers to manage Tuta, which can cause up to 100% loss of tomato fruits if left uncontrolled.
The World Vegetable Center and the Rural Development Administration (RDA), Republic of Korea, have embarked on a technical cooperation project to identify molecular markers associated with disease and insect resistance for marker assisted selection in tomato breeding programs. Specific goals are to map bacterial wilt (Ralstonia solanacearum) and whitefly (Bemisia tabaci) resistance loci.
The World Vegetable Center and the Rural Development Administration (RDA), Republic of Korea, have embarked on a technical cooperation project to identify molecular markers associated with disease and insect resistance for marker assisted selection in tomato breeding programs. Il-Sheob Shin, an RDA scientist seconded to the Center, is the principal investigator, under the supervision of Roland Schafleitner, head of Biotechnology/Molecular Breeding. The project runs through January 2018.
Variations in DREB1A and VP1.1 Genes Show Association with Salt Tolerance Traits in Wild Tomato (Solanum pimpinellifolium)
Association analysis was conducted in a core collection of 94 genotypes of Solanum pimpinellifolium to identify variations linked to salt tolerance traits (physiological and yield traits under salt stress) in four candidate genes viz., DREB1A, VP1.1, NHX1, and TIP.
Conventional and molecular marker-assisted selection and pyramiding of genes for multiple disease resistance in tomato
This work provides greenhouse, field, molecular marker, and laboratory protocols used in the screening and selection process that were applied to segregating populations during generation advance over three years to develop five multiple disease resistant F7 fresh market tomato lines.
Identification of whitefly resistance in closely related wild relatives of cultivated tomato based on trichome type
RECENT RESEARCH Identification of resistance to Bemisia tabaci Genn. in closely related wild relatives of cultivated tomato based on […]
Crop wild relatives are an inestimable source for vegetable improvement to tackle both biotic and abiotic stresses. Consequently, the major focus of this chapter is on the utilization of crop wild relatives in research and breeding of tomato and in other vegetable crops.
AVRDC is a partner in a new € 6.9 million initiative funded by the European Commission to focus on the cataloguing and characterization of global potato, tomato, pepper and eggplant genetic resources
AVRDC - The World Vegetable Center a partner in EU project to improve yield and quality of tomato varieties and management practices in the face of climate change.