What question did this study set out to answer?

The aim is to explore how ARR17 and PISTILLATA gene duplications contribute to sex chromosome turnover in Salix species.

March 15, 2026Genome biology1 citationsOpen Access

Recurrent sex chromosome turnover mediated by distinct ARR17 and PISTILLATA duplications in willows

YWYuan Wang ZXZhi‐Qing Xue RZRengang Zhang

Key Points

The aim is to explore how ARR17 and PISTILLATA gene duplications contribute to sex chromosome turnover in Salix species.
Analysis of genetic structures in 15ZW clade I species
Investigation of recombination patterns in pericentromeric regions
Comparative genomic assessments between species
Distinct duplications of ARR17 and PISTILLATA were identified in multiple Salix species.
Pericentromeric regions demonstrated rare recombination events, facilitating sex chromosome changes.
Findings indicate that these duplications influence evolutionary pathways in willows.

Abstract

The turnover events involving intact ARR17 and partial PI duplications in the 15ZW clade I species involve pericentromeric regions that recombine rarely, making changes possible in these Salix species that would be unlikely in other genome regions.

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