Despite strong heritability, further large scale linkage studies are unlikely to be completed given the costs of ascertaining large numbers of families and the failure of results to converge convincingly to date.
We describe an exact-match based, highly efficient linkage scheme suitable for large scale linkage of hospital records.
The technique describes appears to offer a simple, rapid, highly efficient two-step method for large scale linkage for some important record types, including those found in healthcare.
Previous large scale linkage study in Northern Chinese has identified four significant quantitative trait loci (QTL) for BMD variation on chromosome 2q24, 5q21, 7p21 and 13q21.
Overall, data linkage quality in large scale linkage remains very high, despite the lack of stringent manual quality review procedures, which would be extremely costly on datasets of this size.
A comparison between cis-eQTLs that had been detected in a large scale linkage based genetical genomics study using RNA obtained from peripheral blood mononuclear cells [ 2], and the cis-eQTLs we detected, indicates that 57.3% (distance 250 kb, 0.05FDR) of probes, displaying a genotypic effect in the celiac peripheral blood dataset, also show a linkage cis-eQTL signal.
Additional useful work in humans might focus upon identifying potential regions of interest underlying attention/impulsivity phenotypes on the X chromosome using large scale linkage or association or copy number variant analyses, although the idiosyncratic nature of this chromosome makes it difficult to study using standard methods (Ross et al., 2006; Schaffner, 2004).
Finally, it is important to note that although there is a relatively wide recognition of the benefits of linking data from multiple sources (social services, health records, preschool enrollment, school assessments, etc)., the methods to implement multiple, reliable large-scale linkages are very complex and present formidable challenges.
Finally, we present molecular and large-scale linkage data evidencing that deregulated alternative splicing and RNA editing is involved in the etiology of psychiatric diseases, such as suicidal behaviour.
Therefore, sequencing RR libraries represents an effective option for large-scale linkage mapping studies dealing with species with large genomes.
This study has provided the first large-scale linkage of registry and retrieval data in orthopaedic surgery.
