ARS | Publication request: The Distribution of Genetic Variation in Cultivated Tomato

Submitted to: Plant and Animal Genome Conference Proceedings
Publication Type: Proceedings/Symposium
Publication Acceptance Date: December 1, 2006
Publication Date: N/A

Technical Abstract: Cultivated tomato (Solanum lycopersicum L.) is known to have a narrow genetic base. COSII, EST-based, and several loci related to fruit quality traits were resequenced in a diverse panel of 30 Plant Genetic Resources Unit (PGRU) tomato accessions, line TA496, and Solanum peruvianum accession G 32591. The majority of sampled tomato accessions represented the primary center of diversity (Peru, Chile, and Ecuador), and countries contiguous with the primary center. Original collections were made between 1932 and 1976. Within and between-species diversity estimates are compared for the various marker types and analyzed in terms of exon/intron/UTR. Evidence of historical introgression and the population-level distribution of genetic variation reveal relationships between tomato landraces.