Variation at RFLP loci in Lactuca spp. and origin of cultivated lettuce (L. sativa)

1991/06/01 by Rick Kesseli, Oswaldo Ochoa, O. Ochoa +2 · 2 citations
Agricultural and Biological Sciences · Biochemistry, Genetics and Molecular Biology · #Plant Gene Expression Analysis #Plant tissue culture and regeneration #Plant-Microbe Interactions and Immunity

paper · doi:10.1139/g91-065

openalex publication_date 1991/06/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/06/11

Abstract

We have examined 67 accessions of Lactuca sativa L. and five related species for variation at restriction fragment length polymorphism loci. Fifty-five clones were used to probe genomic DNA digested separately with three restriction endonucleases; this defined 143 loci. Variation in L. sativa was sampled in detail. Lactuca sativa is closely related to L. serriola but not to any of the other species in this survey: L. saligna, L. virosa, L. perennis, and L. indica. However, Lactuca sativa is not a direct extraction from the sampled populations of L. serriola; other L. serriola populations or some other unknown entities were involved in the evolution of cultivated lettuce. Numerous genetic differences characterized each cultivated type, suggesting a polyphyletic origin for L. sativa.Key words: Lactuca sativa, lettuce, genetic variation, phylogeny, restriction fragment length polymorphism.

Citations

• Genetic variation and phylogenies detected from isozyme markers in species of Lactuca

Cited by

• Walnut (Juglans spp.) genetic diversity determined by restriction fragment length polymorphisms
• Wild Lactuca species, their genetic diversity, resistance to diseases and pests, and exploitation in lettuce breeding

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