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S Ludwigsen

Publications and source records attributed to S Ludwigsen.

4 recordsLinked to original sources

A comprehensive human linkage map with centimorgan density. Cooperative Human Linkage Center (CHLC).

In the last few years there have been rapid advances in developing genetic maps for humans, greatly enhancing our ability to localize and identify genes for inherited disorders. Through the collaborative efforts of three large groups generating microsatellite markers and the efforts of the 110 CEPH collaborators, a comprehensive human linkage map is presented here. It consists of 5840 loci, of which 970 are uniquely ordered, covering 4000 centimorgans on the sex-averaged map. Of these loci, 3617 are polymerase chain reaction-formatted short tandem repeat polymorphisms, and another 427 are genes. The map has markers at an average density of 0.7 centimorgan, providing a resource for ready transference to physical maps and achieving one of the first goals of the Human Genome Project--a comprehensive, high-density genetic map.

Chromosome Mapping↗

Integrated human genome-wide maps constructed using the CEPH reference panel.

High resolution linkage maps have proven to be invaluable tools in genetic investigations. We have assembled a collection of genetic maps constructed from primary data collected from investigators performing genotyping using the Centre Etude Polymorphism Humain (CEPH) reference pedigree panel. These maps were constructed using a rigorous, semi-automated map construction algorithm that evaluates the integrity of the maps during construction. Two classes of maps were produced: a high confidence "skeletal" set composed of 544 PCR based markers, and a more highly annotated "framework" set containing maps of 1,123 markers. Genetic map locations within the framework maps are provided for an additional 1,758 loci without statistically unique interval assignments.

Algorithms↗

A microsatellite-based multipoint index map of human chromosome 22.

Utilizing the CEPH (Centre d'Etude du Polymorphism Humain) reference panel and genotyping data for 24 simple tandem repeat polymorphism (STRP) markers, we have constructed a 15-locus multipoint genetic framework map of human chromosome 22. The markers form a continuous linkage group of 51 cM in males and 81 cM in females. Likely genetic locations are provided for 9 additional STRP sequences. The map was constructed employing the CRIMAP computational methodology to build the multipoint map via a stepwise algorithm. The quality of the framework map was evaluated using a battery of statistical diagnostics that suggest a typing error frequency of 0.1% for markers within the map.

Base Sequence↗