Mapping the genetic architecture of complex traits in experimental populations

Yang, Jian, Zhu, Jun and Williams, Robert W. (2007) Mapping the genetic architecture of complex traits in experimental populations. Bioinformatics, 23 12: 1527-1536. doi:10.1093/bioinformatics/btm143

Author Yang, Jian
Zhu, Jun
Williams, Robert W.
Title Mapping the genetic architecture of complex traits in experimental populations
Journal name Bioinformatics   Check publisher's open access policy
ISSN 1367-4803
Publication date 2007-06-01
Year available 2007
Sub-type Article (original research)
DOI 10.1093/bioinformatics/btm143
Open Access Status DOI
Volume 23
Issue 12
Start page 1527
End page 1536
Total pages 10
Language eng
Abstract Currently, there is much debate on the genetic architecture of quantitative traits in wild populations. Is trait variation influenced by many genes of small effect or by a few genes of major effect? Where is additive genetic variation located in the genome? Do the same loci cause similar phenotypic variation in different populations? Great tits (Parus major) have been studied extensively in long-term studies across Europe and consequently are considered an ecological 'model organism'. Recently, genomic resources have been developed for the great tit, including a custom SNP chip and genetic linkage map. In this study, we used a suite of approaches to investigate the genetic architecture of eight quantitative traits in two long-term study populations of great tits--one in the Netherlands and the other in the United Kingdom. Overall, we found little evidence for the presence of genes of large effects in either population. Instead, traits appeared to be influenced by many genes of small effect, with conservative estimates of the number of contributing loci ranging from 31 to 310. Despite concordance between population-specific heritabilities, we found no evidence for the presence of loci having similar effects in both populations. While population-specific genetic architectures are possible, an undetected shared architecture cannot be rejected because of limited power to map loci of small and moderate effects. This study is one of few examples of genetic architecture analysis in replicated wild populations and highlights some of the challenges and limitations researchers will face when attempting similar molecular quantitative genetic studies in free-living populations.
Keyword Drosophila-Melanogaster
Quantitative Traits
Bristle Number
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID 202487
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
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