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Linkage disequilibrium mapping of the bolting gene in sea beet using AFLP markers

Published online by Cambridge University Press:  05 April 2001

MATS HANSEN ,
THOMAS KRAFT ,
SARA GANESTAM ,
TORBJÖRN SÄLL  and
NILS-OTTO NILSSON
MATS HANSEN
Affiliation:
Novartis Seeds AB, PO Box 302, S-261 23 Landskrona, Sweden
THOMAS KRAFT
Affiliation:
Novartis Seeds AB, PO Box 302, S-261 23 Landskrona, Sweden
SARA GANESTAM
Affiliation:
Novartis Seeds AB, PO Box 302, S-261 23 Landskrona, Sweden
TORBJÖRN SÄLL
Affiliation:
Department of Genetics, Lund University, Sölvegatan 29, S-223 62 Lund, Sweden
NILS-OTTO NILSSON
Affiliation:
Novartis Seeds AB, PO Box 302, S-261 23 Landskrona, Sweden
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Abstract

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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.

Type
Research Article
Information
Genetics Research , Volume 77 , Issue 1 , February 2001 , pp. 61 - 66
Copyright
© 2001 Cambridge University Press