Resistance to late blight in Solanum bulbocastanum is mapped to chromosome 8

• Published in: Theoretical and applied genetics Vol. 101; no. 5-6; pp. 697 - 704
• Main Authors: NAESS, S. K, BRADEEN, J. M, WIELGUS, S. M, HABERLACH, G. T, MCGRATH, J. M, HELGESON, J. P
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01-10-2000; Berlin Springer Nature B.V
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; chromosome 8; Chromosomes; Cloning; Cultivars; Development and progression; Diseases and pests; Fundamental and applied biological sciences. Psychology; Fungal diseases of plants; Genetic aspects; Genetic testing; Genetics and breeding of economic plants; Health aspects; Infections; Lycopersicon esculentum; Pest resistance; Physiological aspects; Phytophthora infestans; Plant diseases; Plant genetics; Plant immunology; Plant pathogens; Polymorphism; Potatoes; Solanum bulbocastanum; Solanum tuberosum; Varietal selection. Specialized plant breeding, plant breeding aims; United States; United States > US; Genetic mapping; Genetic marker; Plant pathogen; Solanum tuberosum; Phycomycetes; Backcross; Random amplified polymorphic DNA marker; Fungus resistance; Fungi; Restriction fragment length polymorphism; Dicotyledones; DNA; Angiospermae; Chromosome 8; Phytophthora infestans; Somatic hybrid; Wild plant; Spermatophyta; Solanaceae; Tuber plant; Thallophyta
• ISSN: 0040-5752; 1432-2242
• DOI: 10.1007/s001220051533

Somatic hybrids between potato and Solanum bulbocastanum, a wild diploid (2n = 2x = 24) Mexican species, are highly resistant to late blight, caused by Phytophthora infestans. Both randomly amplified polymorphic DNA (RAPD) and restriction fragment length polymorphism (RFLP) markers that are closely linked to the resistance have been noted by analysis of three different backcross-2 populations derived from two different somatic hybrids. With reference to previously published potato and tomato maps, resistance appears to be on the long arm of chromosome 8 and is flanked by RFLP markers CP53 and CT64. In a population of [BC.sub.2] plants derived from a cross between the [BC.sub.1] line J10lK6 [(S. tuberosum PI 203900+S. bulbocastanum PI 243510) xKatahdin)]xAtlantic, late blight resistance cosegregated with RFLP marker CT88 and RAPD marker OPG02-625.