TABLE 1.

Summary of current information about sex‐linked regions in Populus and Salix

Taxon	Species	Male or female heterogamety	Chromosome carrying the sex‐determining locus	Estimated size of the sex‐linked regions (kb)	References
Populus (poplars)	P. balsamifera	Male	19	~100 (Y)	Geraldes et al. (2015); McKown et al. (2017)
	P. deltoides	Male	19	~300 (X, Y)	Xue et al. (2020)
	P. euphratica	Male	14	~84 (X), 658 (Y)	Yang et al. (2020)
	P. nigra	Male	19	Unknown	Gaudet et al. (2008);
	P. tremula	Male	19	~1000 (Y)	Müller et al. (2020)
	P. trichocarpa	Male	19	~100 (Y)	Geraldes et al. (2015); McKown et al. (2017); Zhou, Macaya‐Sanz, Schmutz, et al. (2020))
	P. tremuloides	Male	19	2000 (Y)	Pakull et al. (2009); Kersten et al. (2014)
	P. alba	Female	19	~140 (W), 33 (Z)	Müller et al. (2020); Yang et al. (2020)
Salix (willows)	subgenus Salix clade
	S. dunnii	Male	7	3205 (X)	This study
	S. nigra	Male	7	2000	Sanderson et al. (2021)
	section Amygdalinae
	S. triandra	Female	15	~6500	Li et al. (2020)
	Chamaetia‐Vetrix clade
	S. purpurea	Female	15	6800 (W), 4000 (Z)	Zhou, Macaya‐Sanz, Carlson, et al. (2020))
	S. suchowensis	Female	15	Unknown	Hou et al. (2015)
	S. viminalis	Female	15	3100–3400 (W, Z)	Almeida et al. (2020)