High Resolution Mapping of a Novel Late Blight Resistance Gene Rpi-avl1, from the Wild Bolivian Species Solanum avilesii

• Published in: American journal of potato research 2011-12, Vol.88 (6), p.511-519
• Main Authors: Verzaux, Estelle, Budding, Dirk, Vetten, Nick de, Niks, Rients E, Vleeshouwers, Vivianne G.A.A, Vossen, Edwin A. G. van der, Jacobsen, Evert, Visser, Richard G.F
• Format: Article
• Language: English
• Subjects: Agriculture; Agronomy. Soil science and plant productions; Biological and medical sciences; Biomedical and Life Sciences; chromosomes; Cloning; diploidy; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; genes; Genetics and breeding of economic plants; genotype; Life Sciences; marker-assisted selection; pathogens; Pest resistance; phenotype; Phytopathology. Animal pests. Plant and forest protection; Phytophthora infestans; Plant Breeding/Biotechnology; Plant Genetics and Genomics; Plant pathogens; Plant Pathology; Plant Sciences; provenance; Solanum avilesii; Varietal selection. Specialized plant breeding, plant breeding aims
• ISSN: 1099-209X; 1874-9380
• DOI: 10.1007/s12230-011-9218-z

Both Mexico and South America are rich in Solanum species that might be valuable sources of resistance (R) genes to late blight (Phytophthora infestans). Here, we focus on an R gene present in the diploid Bolivian species S. avilesii. The genotype carrying the R gene was resistant to eight out of 10 Phytophthora isolates of various provenances. The identification of a resistant phenotype and the generation of a segregating population allowed the mapping of a single dominant R gene, Rpi-avl1, which is located in an R gene cluster on chromosome 11. This R gene cluster is considered as an R gene "hot spot", containing R genes to at least five different pathogens. High resolution mapping of the Rpi-avl1 gene revealed a marker co-segregating in 3890 F1 individuals, which may be used for marker assisted selection in breeding programs and for further cloning of Rpi-avl1.