Data from: Retrotransposon proliferation coincident with the evolution of dioecy in asparagus

Alex Harkess, Francesco Mercati, Loredana Abbate, Michael McKain, J. Chris Pires, Tea Sala, Francesco Sunseri, Agostino Falavigna & Jim Leebens-Mack
Current phylogenetic sampling reveals that dioecy and an XY sex chromosome pair evolved once or possibly twice in the genus Asparagus. Although there appear to be some lineage-specific polyploidization events, the base chromosome number of 2n=2x=20 is relatively conserved across the Asparagus genus. Regardless, dioecious species tend to have larger genomes than hermaphroditic species. Here we test whether this genome size expansion in dioecious species is related to a polyploidization and subsequent chromosome fusion or...
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