Abstract：
:Linkage disequilibrium (LD), the nonrandom occurrence of alleles in haplotypes, has long been of interest to population geneticists. Recently, the rapidly increasing availability of genomic polymorphism data has fueled interest in LD as a tool for fine-scale mapping, in particular for human disease loci. The chromosomal extent of LD is crucial in this context, because it determines how dense a map must be for associations to be detected and, conversely, limits how finely loci may be mapped. Arabidopsis thaliana is expected to harbor unusually extensive LD because of its high degree of selfing. Several polymorphism studies have found very strong LD within individual loci, but also evidence of some recombination. Here we investigate the pattern of LD on a genomic scale and show that in global samples, LD decays within approximately 1 cM, or 250 kb. We also show that LD in local populations may be much stronger than that of global populations, presumably as a result of founder events. The combination of a relatively high level of polymorphism and extensive haplotype structure bodes well for developing a genome-wide LD map in A. thaliana.
journal_name
Nat Genetjournal_title
Nature geneticsauthors
Nordborg M,Borevitz JO,Bergelson J,Berry CC,Chory J,Hagenblad J,Kreitman M,Maloof JN,Noyes T,Oefner PJ,Stahl EA,Weigel Ddoi
10.1038/ng813keywords:
subject
Has Abstractpub_date
2002-02-01 00:00:00pages
190-3issue
2eissn
1061-4036issn
1546-1718pii
ng813journal_volume
30pub_type
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