TY - JOUR
T1 - Parallel Selection Mapping Using Artificially Selected Mice Reveals Body Weight Control Loci
AU - Chan, Yingguang Frank
AU - Jones, Felicity C.
AU - McConnell, Ellen
AU - Bryk, Jarosław
AU - Bünger, Lutz
AU - Tautz, Diethard
PY - 2012/5/8
Y1 - 2012/5/8
N2 - Understanding how polygenic traits evolve under selection is an unsolved problem [1], because challenges exist for identifying genes underlying a complex trait and understanding how multilocus selection operates in the genome. Here we study polygenic response to selection using artificial selection experiments. Inbred strains from seven independent long-term selection experiments for extreme mouse body weight ("high" lines weigh 42-77 g versus 16-40 g in "control" lines) [2] were genotyped at 527,572 SNPs to identify loci controlling body weight. We identified 67 parallel selected regions (PSRs) where high lines share variants rarely found among the controls. By comparing allele frequencies in one selection experiment [2-4] against its unselected control, we found classical selective sweeps centered on the PSRs. We present evidence supporting two G protein-coupled receptors GPR133 and Prlhr as positional candidates controlling body weight. Artificial selection may mimic natural selection in the wild: compared to control loci, we detected reduced heterozygosity in PSRs in unusually large wild mice on islands. Many PSRs overlap loci associated with human height variation [5], possibly through evolutionary conserved functional pathways. Our data suggest that parallel selection on complex traits may evoke parallel responses at many genes involved in diverse but relevant pathways.
AB - Understanding how polygenic traits evolve under selection is an unsolved problem [1], because challenges exist for identifying genes underlying a complex trait and understanding how multilocus selection operates in the genome. Here we study polygenic response to selection using artificial selection experiments. Inbred strains from seven independent long-term selection experiments for extreme mouse body weight ("high" lines weigh 42-77 g versus 16-40 g in "control" lines) [2] were genotyped at 527,572 SNPs to identify loci controlling body weight. We identified 67 parallel selected regions (PSRs) where high lines share variants rarely found among the controls. By comparing allele frequencies in one selection experiment [2-4] against its unselected control, we found classical selective sweeps centered on the PSRs. We present evidence supporting two G protein-coupled receptors GPR133 and Prlhr as positional candidates controlling body weight. Artificial selection may mimic natural selection in the wild: compared to control loci, we detected reduced heterozygosity in PSRs in unusually large wild mice on islands. Many PSRs overlap loci associated with human height variation [5], possibly through evolutionary conserved functional pathways. Our data suggest that parallel selection on complex traits may evoke parallel responses at many genes involved in diverse but relevant pathways.
UR - http://www.scopus.com/inward/record.url?scp=84860717143&partnerID=8YFLogxK
UR - https://www.sciencedirect.com/journal/current-biology
U2 - 10.1016/j.cub.2012.03.011
DO - 10.1016/j.cub.2012.03.011
M3 - Article
C2 - 22445301
AN - SCOPUS:84860717143
VL - 22
SP - 794
EP - 800
JO - Current Biology
JF - Current Biology
SN - 0960-9822
IS - 9
ER -