Abstract
Bread wheat (Triticum aestivum), during its evolution, experienced severe genetic bottlenecks due to polyploidization and domestication. Then, breeding programs, triggered mainly by the Green Revolution within a narrow range of breeders' preferred parents, while increasing the global wheat productivity, produced a further and evident reduction of genetic diversity. A clear picture of the impact of domestication and breeding on genetic diversity was achieved after recent studies that highlight loci subjected to past or ongoing selection, described as selection signatures or selective sweeps.
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