Diploid and haploid assemblies and annotation of monoecious shrub willow (Salix purpurea), clone ID 94003

<p>The Salicaceae are dioecious perennials that utilize different sex determination systems. There is substantial interest in understanding the impacts of hybridization, speciation, and polyploidy on sex chromosome evolution. Here, a rare monoecious <em>S. purpurea</em> genotype, 94003, was assembled. Based on sequence alignments to dioecious and monoecious genomes, a 1.15 Mb sex-linked region on Chr15W was identified as absent in monecious plants. Inheritance of this structural variation is responsible for the loss of a male-suppressing function in what would otherwise be genetic females, resulting in monoecy or lethality, if homozygous.</p>