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SELECTION AND GENOMES. “Even though the effects of selection on linked neutral diversity (linked selection) within populations are well documented, recent observations of diversity and differentiation landscapes that are highly correlated even among independent lineages suggest that the effects of long-term linked selection may have a deeper impact on the evolution of the genomic landscapes of diversity and differentiation than previously anticipated.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

ACTIVE SPANDRELS. “In such genomic regions, linkage extends over physically larger genome stretches, and selection affects a particularly high number of linked neutral sites.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

EVOLUTIONARY SPANDREL. “In genomic regions where recombination is infrequent, accentuated differentiation can evolve as a by-product of diversity reductions unrelated to adaptation or speciation.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

PURIFYING SELECTION. “Instead of being an effect of selective sweeps or barriers to gene flow, accentuated differentiation can evolve by any process reducing genetic diversity locally within the genome, including purifying selection at linked sites (background selection).” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

SO ENDS this one weekend sojourn into linked selection and demography as a window into what some modern ecologists are thinking about; Darwin’s theory of evolution is hereby combined with molecular genetics, and the mechanisms and consequences of natural selection are explored. Considering that the modern concept of the gene did not exist in Darwin’s day, this footnoting of his theory is all the more extraordinary. View in LinkedIn

ADDITIONAL FACTOR. “To further complicate the issue, demographic effects can act to enhance or counter the effects of linked selection.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

DISCONNECT. “In species with long-term conserved broad-scale recombination landscapes, such as birds, the replication of accentuated differentiation may therefore not be informative regarding a genomic region's involvement in adaptation or speciation, nor indicative of parallel ecology-related evolution.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

DIVERSITY LANDSCAPE. “The extended periods of time across which this process is active have two notable implications: the slow process of background selection alone might suffice for the evolution of correlated differentiation landscapes, and sweeps in the ancestral (as opposed to extant) lineage may make contributions to extant genomic landscapes of diversity and differentiation.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

INHERITANCE. “As a result, along with heterogeneous recombination landscapes, ancestors transmit a diversity landscape to their daughter species whose heterogeneity may continue to be maintained by liked selection for as long as the recombination landscape persists.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn

LINKED SELECTION. “In genome regions in which low-recombination rate is conserved across multiple consecutive speciation events, the diversity-reducing effects of linked selection accumulate across extended periods of time.” http://onlinelibrary.wiley.com/doi/10.1111/mec.14167/full View in LinkedIn