|Tag: tomato

Evaluation of wild tomato accessions

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.

2016-10-22T04:50:26+00:00July 6th, 2016|Categories: Recent Research|Tags: , , , |

Technical cooperation to identify molecular markers in tomato

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.

2016-10-22T04:50:33+00:00May 11th, 2016|Categories: Project Profiles|Tags: , , , |

Technical cooperation to identify molecular markers in tomato

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.

2016-10-22T04:50:33+00:00May 11th, 2016|Categories: In Brief|Tags: , , |

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.

2016-10-22T04:50:41+00:00April 27th, 2016|Categories: Recent Research|Tags: , , |

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.

2016-10-22T04:50:47+00:00April 26th, 2016|Categories: Recent Research|Tags: , , , |