TY - JOUR

T1 - Stick insect genomes reveal natural selection's role in parallel speciation

AU - Soria-Carrasco, Víctor

AU - Gompert, Zachariah

AU - Comeault, Aaron A

AU - Farkas, Timothy E

AU - Parchman, Thomas L

AU - Johnston, J Spencer

AU - Buerkle, C Alex

AU - Feder, Jeffrey L

AU - Bast, Jens

AU - Schwander, Tanja

AU - Egan, Scott P

AU - Crespi, Bernard J

AU - Nosil, Patrik

N1 - Copyright © 2014, American Association for the Advancement of Science.

PY - 2014/5/16

Y1 - 2014/5/16

N2 - Natural selection can drive the repeated evolution of reproductive isolation, but the genomic basis of parallel speciation remains poorly understood. We analyzed whole-genome divergence between replicate pairs of stick insect populations that are adapted to different host plants and undergoing parallel speciation. We found thousands of modest-sized genomic regions of accentuated divergence between populations, most of which are unique to individual population pairs. We also detected parallel genomic divergence across population pairs involving an excess of coding genes with specific molecular functions. Regions of parallel genomic divergence in nature exhibited exceptional allele frequency changes between hosts in a field transplant experiment. The results advance understanding of biological diversification by providing convergent observational and experimental evidence for selection's role in driving repeatable genomic divergence.

AB - Natural selection can drive the repeated evolution of reproductive isolation, but the genomic basis of parallel speciation remains poorly understood. We analyzed whole-genome divergence between replicate pairs of stick insect populations that are adapted to different host plants and undergoing parallel speciation. We found thousands of modest-sized genomic regions of accentuated divergence between populations, most of which are unique to individual population pairs. We also detected parallel genomic divergence across population pairs involving an excess of coding genes with specific molecular functions. Regions of parallel genomic divergence in nature exhibited exceptional allele frequency changes between hosts in a field transplant experiment. The results advance understanding of biological diversification by providing convergent observational and experimental evidence for selection's role in driving repeatable genomic divergence.

KW - Animals

KW - Ceanothus

KW - Gene Frequency

KW - Genetic Speciation

KW - Genetic Variation

KW - Genome, Insect

KW - Herbivory

KW - Insecta/classification

KW - Phylogeny

KW - Selection, Genetic

U2 - 10.1126/science.1252136

DO - 10.1126/science.1252136

M3 - Article

C2 - 24833390

VL - 344

SP - 738

EP - 742

JO - Science

JF - Science

SN - 0036-8075

IS - 6185

ER -