Paper Info
Title
ADDO: a comprehensive toolkit to detect, classify and visualise additive and non-additive Quantitative Trait Loci.
Abstract
Motivation: During the past decade, genome-wide association studies (GWAS) have been used to map quantitative trait loci (QTLs) underlying complex traits. However, most GWAS focus on additive genetic effects while ignoring non-additive effects, on the assumption that most QTL act additively. Consequently, QTLs driven by dominance and other non-additive effects could be overlooked. Results: We developed ADDO, a highly efficient tool to detect, classify and visualize QTLs with additive and non-additive effects. ADDO implements a mixed-model transformation to control for population structure and unequal relatedness that accounts for both additive and dominant genetic covariance among individuals, and decomposes single-nucleotide polymorphism effects as either additive, partial dominant, dominant or over-dominant. A matrix multiplication approach is used to accelerate the computation: a genome scan on 13 million markers from 900 individuals takes about 5 h with 10 CPUs. Analysis of simulated data confirms ADDO's performance on traits with different additive and dominance genetic variance components. We showed two real examples in outbred rat where ADDO identified significant dominant QTL that were not detectable by an additive model. ADDO provides a systematic pipeline to characterize additive and non-additive QTL in whole genome sequence data, which complements current mainstream GWAS software for additive genetic effects.
Year
DOI
Venue
2020
10.1093/bioinformatics/btz786
BIOINFORMATICS
DocType
Volume
Issue
Journal
36
5
ISSN
Citations 
PageRank 
1367-4803
0
0.34
References 
Authors
0
5
Name
Order
Citations
PageRank
Leilei Cui100.34
Bin Yang200.34
Nikolas Pontikos341.34
Richard Mott412164.85
Lusheng Huang500.34