Color phenotypes are under similar genetic control in two distantly related species of Timema stick insect
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: Evolution, Cyfrol 70, Rhif 6, 21.06.2016, t. 1283-96.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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T1 - Color phenotypes are under similar genetic control in two distantly related species of Timema stick insect
AU - Comeault, Aaron A
AU - Carvalho, Clarissa F
AU - Dennis, Stuart
AU - Soria-Carrasco, Víctor
AU - Nosil, Patrik
N1 - © 2016 The Author(s). Evolution © 2016 The Society for the Study of Evolution.
PY - 2016/6/21
Y1 - 2016/6/21
N2 - Ecology and genetics are both of general interest to evolutionary biologists as they can influence the phenotypic and genetic response to selection. The stick insects Timema podura and Timema cristinae exhibit a green/melanistic body color polymorphism that is subject to different ecologically based selective regimes in the two species. Here, we describe aspects of the genetics of this color polymorphism in T. podura, and compare this to previous results in T. cristinae. We first show that similar color phenotypes of the two species cluster in phenotypic space. We then use genome-wide association mapping to show that in both species, color is controlled by few loci, dominance relationships between color alleles are the same, and SNPs associated with color phenotypes colocalize to the same linkage group. Regions within this linkage group that harbor genetic variants associated with color exhibit elevated linkage disequilibrium relative to genome wide expectations, but more strongly so in T. cristinae. We use these results to discuss predictions regarding how the genetics of color could influence levels of phenotypic and genetic variation that segregate within and between populations of T. podura and T. cristinae, drawing parallels with other organisms.
AB - Ecology and genetics are both of general interest to evolutionary biologists as they can influence the phenotypic and genetic response to selection. The stick insects Timema podura and Timema cristinae exhibit a green/melanistic body color polymorphism that is subject to different ecologically based selective regimes in the two species. Here, we describe aspects of the genetics of this color polymorphism in T. podura, and compare this to previous results in T. cristinae. We first show that similar color phenotypes of the two species cluster in phenotypic space. We then use genome-wide association mapping to show that in both species, color is controlled by few loci, dominance relationships between color alleles are the same, and SNPs associated with color phenotypes colocalize to the same linkage group. Regions within this linkage group that harbor genetic variants associated with color exhibit elevated linkage disequilibrium relative to genome wide expectations, but more strongly so in T. cristinae. We use these results to discuss predictions regarding how the genetics of color could influence levels of phenotypic and genetic variation that segregate within and between populations of T. podura and T. cristinae, drawing parallels with other organisms.
KW - Animals
KW - Biological Evolution
KW - Color
KW - Genome-Wide Association Study
KW - Insecta/genetics
KW - Phenotype
KW - Pigmentation
KW - Polymorphism, Genetic
U2 - 10.1111/evo.12931
DO - 10.1111/evo.12931
M3 - Article
C2 - 27130287
VL - 70
SP - 1283
EP - 1296
JO - Evolution
JF - Evolution
SN - 0014-3820
IS - 6
ER -