Evaluation and inheritance of resistance to Orobanche ramosa in cultivated and wild tomato species [electronic resource].

Includes references.

This study was conducted in a field heavily infested with broomrape in Giza Governorate, Egypt during the period from 2004 to 2007. Evaluation included Solanum lycopersicum accessions Castlerack, Edkawy, Giza 80, Oxheart,, LA 2530, LA 2530 sel. A and PI 367977; and 38 accessions of 5 wild species, viz, S. lycapersicum var. cerasiforme , S. habrochaites, S. pennellii , S. peruvianum , and S. pimpinellifolium; and one accession of S. peruvianum x S. Lycopersicum. O.ramosa was the only broomrape species that appeared in the trial field in all seasons. Plants ofS. pennellii LA 716 were completely free ofbroomrape infection in the two seasons. The most promising genotypes following S. pennellii LA 716 were S. pimpinellifolium PI 407546 and PI 407555 sel. C which showed moderate level of broomrape resistance. Parental , F₁ , and F₂ populations of the cross Castlerock x S. pennellii LA 716 were evaluated/or broomrape resistance. Broomrape resistance was found to be recessive and controlled by two pairs of recessive duplicate epistatic genes any of which eauses resistance.

Summary in Arabic.

1