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Correlated patterns of genetic diversity and differentiation across an avian family
TLDR
Comparative studies of closely related taxa suggest similar processes may be driving the differentiation of these independently evolving lineages, which in turn may be the result of intrinsic properties of particular genomic regions (e.g. areas of low recombination).
Repeated divergent selection on pigmentation genes in a rapid finch radiation
TLDR
This work sequenced the genomes of a phenotypically diverse set of species to search for differentiated genomic regions, finding many divergent regions contain genes involved in the melanogenesis pathway, with the strongest signal originating from putative regulatory regions.
Rapid phenotypic evolution during incipient speciation in a continental avian radiation
TLDR
It is argued that this apparent uncoupling between neutral DNA homogeneity and phenotypic diversity is expected for a recent group within the framework of coalescent theory, and how the ecology of open habitats in South America during the Pleistocene could have helped promote this unique and ongoing radiation.
Distinguishing noise from signal in patterns of genomic divergence in a highly polymorphic avian radiation
TLDR
A detailed demographic inference indicates that genetic differences among Sporophila species could be the consequence of neutral processes, which include a very large ancestral effective population size that accentuates the effects of incomplete lineage sorting.
Double‐digest RAD sequencing outperforms microsatellite loci at assigning paternity and estimating relatedness: A proof of concept in a highly promiscuous bird
TLDR
This work presents a double‐digest restriction site‐associated DNA sequencing (ddRAD‐seq) analysis pipeline that simultaneously achieves the SNP discovery and genotyping steps and which is optimized to return a statistically powerful set of SNP markers from large numbers of individuals.
Divergence between passerine populations from the Malvinas - Falkland Islands and their continental counterparts: A comparative phylogeographical study
TLDR
The results suggest that the land bird populations of the MFI were established at different times, and Troglodytes cobbi is the oldest MFI land bird, splitting from continental T. aedon during the Great Patagonian Glaciation of the Pleistocene.
Secondary contact followed by gene flow between divergent mitochondrial lineages of a widespread Neotropical songbird (Zonotrichia capensis)
TLDR
The secondary contact between divergent lineages of a widespread Neotropical songbird, the Rufous-collared sparrow, is investigated, finding that genetic, morphological, and/or cultural differences accumulated among lineages during isolation were insufficient to prevent gene flow after secondary contact.
Extensive sampling of polar bears (Ursus maritimus) in the Northwest Passage (Canadian Arctic Archipelago) reveals population differentiation across multiple spatial and temporal scales
TLDR
Data suggest that gene flow is insufficient to homogenize the GB and MC populations and support the designation of GB andMC as separate polar bear conservation units, and provide a striking example of how nuclear DNA and mtDNA capture different aspects of a species demographic history.
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