The genomic landscape underlying phenotypic integrity in the face of gene flow in crows

@article{Poelstra2014TheGL,
  title={The genomic landscape underlying phenotypic integrity in the face of gene flow in crows},
  author={J. Poelstra and N. Vijay and C. Bossu and H. Lantz and B. Ryll and I. M{\"u}ller and V. Baglione and P. Unneberg and M. Wikelski and M. Grabherr and J. Wolf},
  journal={Science},
  year={2014},
  volume={344},
  pages={1410 - 1414}
}
Crows of a feather flock together Closely related species with overlapping ranges typically evolve genetic barriers to prevent crossbreeding. Poelstra et al. sequenced genes from two species of central European crows: gray-bodied hooded crows and black carrion crows (see the Perspective by de Knijff). Although most of the genomes shared genes between the two species, one region that affected coat color and color vision differed. The authors suggest that black and gray-coated crows prefer to… Expand
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References

SHOWING 1-10 OF 111 REFERENCES
An extensive candidate gene approach to speciation: diversity, divergence and linkage disequilibrium in candidate pigmentation genes across the European crow hybrid zone
TLDR
The results add to the debate as to the utility of candidate gene approaches in relation to genomic features and the genetic architecture of the phenotypic trait in question, by identifying a comprehensive panel of 95 candidate pigmentation genes for birds. Expand
Genome-wide evidence for speciation with gene flow in Heliconius butterflies.
TLDR
Overall these results show that species divergence can occur in the face of persistent and genome-wide admixture over long periods of time. Expand
Nucleotide divergence vs. gene expression differentiation: comparative transcriptome sequencing in natural isolates from the carrion crow and its hybrid zone with the hooded crow
TLDR
A clear clustering of expression profiles is found for the pure carrion crow animals and disperse profiles for the animals from the hybrid zone, suggesting that gene expression differences may indeed be a sensitive indicator of initial species divergence. Expand
Genomic islands of divergence are not affected by geography of speciation in sunflowers.
TLDR
It is found that genetic divergence is lower in sympatric and parapatric comparisons, consistent with a role for gene flow in eroding neutral differences, and the results indicate that the functional architecture of genomes plays a larger role in shaping genomic divergence than does the geography of speciation. Expand
An analysis of population genetic differentiation and genotype–phenotype association across the hybrid zone of carrion and hooded crows using microsatellites and MC1R
TLDR
A similar degree of genetic differentiation was found between allopatric and edge populations irrespectively of their location in relation to the hybrid zone, which is striking considering that carrion and hooded crows are phenotypically distinct and sometimes recognised as separate species. Expand
The genomic landscape of species divergence in Ficedula flycatchers
TLDR
This study provides a roadmap to the emerging field of speciation genomics by showing that the genomic landscape of species differentiation is highly heterogeneous with approximately 50 ‘divergence islands’ showing up to 50-fold higher sequence divergence than the genomic background. Expand
Hybridization and speciation
TLDR
A perspective on the context and evolutionary significance of hybridization during speciation is offered, highlighting issues of current interest and debate and suggesting that the Dobzhansky–Muller model of hybrid incompatibilities requires a broader interpretation. Expand
The genomics of speciation-with-gene-flow.
TLDR
A theory predicting four phases of speciation, defined by changes in the relative effectiveness of divergence and genome hitchhiking, is described and future directions are outlined, emphasizing the need to couple next-generation sequencing with selection, transplant, functional genomics, and mapping studies. Expand
Butterfly genome reveals promiscuous exchange of mimicry adaptations among species
TLDR
It is inferred that closely related Heliconius species exchange protective colour-pattern genes promiscuously, implying that hybridization has an important role in adaptive radiation. Expand
Revisiting the Impact of Inversions in Evolution: From Population Genetic Markers to Drivers of Adaptive Shifts and Speciation?
TLDR
There is a growing appreciation that chromosome inversions affect rates of adaptation, speciation, and the evolution of sex chromosomes, but few genes within inversions responsible for fitness effects or speciation have been identified. Expand
...
1
2
3
4
5
...