Mats Hansen1, Thomas Kraft1, SARA GANESTAM1, Torbjörn Säll2, Nils‐Otto Nilsson1
1Novartis Seeds AB, PO Box 302, S-261 23 Landskrona, Sweden
2Department of Genetics, Lund University, Sölvegatan 29, S-223 62 Lund, Sweden
Tóm tắt
The possibility of using linkage disequilibrium mapping in natural plant populations was assessed.
In studying linkage disequilibrium among 137 mapped AFLP markers in four populations of sea
beet (Beta vulgaris ssp. maritima (L.) Arcang.) it was shown that tightly linked loci could be
detected by screening for associations. It was hypothesized that the short distances spanned by
linkage disequilibrium enable markers that are very tightly linked to a target gene to be identified.
The hypothesis was tested by whole-genome screening of AFLP markers for association with the
gene for the annual growth habit, the B gene, in a sample of 106 sea beets. Despite the dominant
nature of AFLP, two markers showing significant linkage disequilibrium with the B gene were
detected. The results indicate the potential use of linkage disequilibrium for gene mapping in
natural plant populations.
