Abstract:
:With the recent development of whole-exome sequencing enrichment designs for the dog, a novel tool for disease-association studies became available. The aim of disease-association studies is to identify one or a very limited number of putative causal variants or genes from the large pool of genetic variation. To maximize the efficiency of these studies and to provide some directions of what to expect, we evaluated the effect on variant reduction for various combinations of cases and controls for both dominant and recessive types of inheritance assuming variable degrees of penetrance and detectance. In this study, variant data of 14 dogs (13 Labrador Retrievers and one Dogue de Bordeaux), obtained by whole-exome sequencing, were analyzed. In the filtering process, we found that unrelated dogs from the same breed share up to 70% of their variants, which is likely a consequence of the breeding history of the dog. For the designs tested with unrelated dogs, combining two cases and two controls gave the best result. These results were improved further by adding closely related dogs. Reduced penetrance and/or detectance has a drastic effect on the efficiency and is likely to have a profound effect on the sample size needed to elucidate the causal variant. Overall, we demonstrated that sequencing a small number of dogs results in a marked reduction of variants that are likely sufficient to pinpoint causal variants or genes.
journal_name
Anim Genetjournal_title
Animal geneticsauthors
Broeckx BJ,Coopman F,Verhoeven GE,De Keulenaer S,De Meester E,Bavegems V,Smets P,Van Ryssen B,Van Nieuwerburgh F,Deforce Ddoi
10.1111/age.12400subject
Has Abstractpub_date
2016-04-01 00:00:00pages
200-7issue
2eissn
0268-9146issn
1365-2052journal_volume
47pub_type
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