| 摘要 |
<p>A method for rapidly determining the species and/or strain of an organism by genotyping is presented. The method extends the use of indexing linkers to a method of genotyping. The genome of an unknown organism is digested by a restriction endonuclease which cleaves at a site different from the recognition site of the enzyme thereby producing DNA fragments and producing staggered ends. A subset of these fragments is ligated to linkers with staggered ends, with only those DNA fragments with staggered ends which are complementary to the staggered ends of the linkers being ligated to the linkers. DNA fragments with linkers at each end are then amplified. The number and sizes of amplified DNA fragments are then compared to a database containing the expected number and sizes of fragments from known organisms. A match between the assay data and the database is determinative of the species or strain of the unknown organism. In a preferred mode, the assay utilizes a single enzyme, single linker and single primer thereby resulting in a simplified assay.</p> |
