Epistasis dominates the genetic architecture of Drosophila quantitative traits

被引：264

作者：

Huang, Wen ^{[1
]}

Richards, Stephen ^{[3
]}

Carbone, Mary Anna ^{[1
]}

Zhu, Dianhui ^{[3
]}

Anholt, Robert R. H. ^{[2
]}

Ayroles, Julien F. ^{[1
]}

Duncan, Laura ^{[1
]}

Jordan, Katherine W. ^{[1
]}

Lawrence, Faye ^{[1
]}

Magwire, Michael M. ^{[1
]}

Warner, Crystal B. ^{[3
]}

Blankenburg, Kerstin ^{[3
]}

Han, Yi ^{[3
]}

Javaid, Mehwish ^{[3
]}

Jayaseelan, Joy ^{[3
]}

Jhangiani, Shalini N. ^{[3
]}

Muzny, Donna ^{[3
]}

Ongeri, Fiona ^{[3
]}

Perales, Lora ^{[3
]}

Wu, Yuan-Qing ^{[3
]}

Zhang, Yiqing ^{[3
]}

Zou, Xiaoyan ^{[3
]}

Stone, Eric A. ^{[1
]}

Gibbs, Richard A. ^{[3
]}

Mackay, Trudy F. C. ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Genet, Raleigh, NC 27695 USA

[2] N Carolina State Univ, Dept Biol, Raleigh, NC 27695 USA

[3] Baylor Coll Med, Human Genome Sequencing Ctr, Houston, TX 77030 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2012年 / 109卷 / 39期

基金：

美国国家卫生研究院;

关键词：

chill coma recovery; genetic interaction networks; genome-wide association studies; startle response; starvation resistance; ARABIDOPSIS-THALIANA; MISSING HERITABILITY; HUMAN HEIGHT; EVOLUTION; POOLS;

D O I：

10.1073/pnas.1213423109

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Epistasis-nonlinear genetic interactions between polymorphic loci-is the genetic basis of canalization and speciation, and epistatic interactions can be used to infer genetic networks affecting quantitative traits. However, the role that epistasis plays in the genetic architecture of quantitative traits is controversial. Here, we compared the genetic architecture of three Drosophila life history traits in the sequenced inbred lines of the Drosophila melanogaster Genetic Reference Panel (DGRP) and a large outbred, advanced intercross population derived from 40 DGRP lines (Flyland). We assessed allele frequency changes between pools of individuals at the extremes of the distribution for each trait in the Flyland population by deep DNA sequencing. The genetic architecture of all traits was highly polygenic in both analyses. Surprisingly, none of the SNPs associated with the traits in Flyland replicated in the DGRP and vice versa. However, the majority of these SNPs participated in at least one epistatic interaction in the DGRP. Despite apparent additive effects at largely distinct loci in the two populations, the epistatic interactions perturbed common, biologically plausible, and highly connected genetic networks. Our analysis underscores the importance of epistasis as a principal factor that determines variation for quantitative traits and provides a means to uncover genetic networks affecting these traits. Knowledge of epistatic networks will contribute to our understanding of the genetic basis of evolutionarily and clinically important traits and enhance predictive ability at an individualized level in medicine and agriculture.

引用

页码：15553 / 15559

页数：7

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