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Divergence and Functional Degradation of a Sex Chromosome-like Supergene [Current biology]

par Frédéric Magné - publié le

A major challenge in biology is to understand the genetic basis of adaptation. One compelling idea is that groups of tightly linked genes (i.e., “supergenes” [ 1, 2 ]) facilitate adaptation in suites of traits that determine fitness. Despite their likely importance, little is known about how alternate supergene alleles arise and become differentiated, nor their ultimate fate within species. Herein we address these questions by investigating the evolutionary history of a supergene in white-throated sparrows, Zonotrichia albicollis.(...)

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