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