Table I. Information on the cloning of the Salix spp. MAX alleles.

F, Forward, R, reverse.

Allele	Primersa	GenBank Accession No.	Clonal Name	DNA Source Species	No. of Sequences Recovered	Closest Poplar Homolog
SxMAX1B	F: 5′-ATGGATTTACAGGTTTTGTTTACAG-3′	JN613462	S3	S. viminalis × [S. viminalis × (S. viminalis × S. schwerinii)]	1	0006s24320
	R: 5′-TCAAGTTCGTTTTATGATTCTAAGC-3′
SxMAX2A	F: 5′-ATGGCTGCTACCATGAACGATC-3′	JN613463	S3	S. viminalis × [S. viminalis × (S. viminalis × S. schwerinii)]	1	0014s13910
	R: 5′-TCAGTCGAGGATCGGACGCC-3′
SxMAX2B	F: 5′-ATGGCTGCTACCATGAACGATC-3′	JN613464	R13	S. viminalis × [S. viminalis × (S. viminalis × S. schwerinii)]	2	0014s13910
	R: 5′-TCAGTCGAGGATCGGACGCC-3′
SxMAX4B	F: 5′-ATGGCTTCCTTGGCATTTTCC-3′	JN613465	S3	S. viminalis × [S. viminalis × (S. viminalis × S. schwerinii)]	1	0006s25490
	R: 5′-TTATTTCTTTGGCACCCAGCATC-3′
SxMAX4E	F: 5′-CTCCAACTTGGTATGTCTCCC-3′	JX391953	RES0453	Salix aurita	2	0006s25490
	R: 5′-GATAGCTAAATCACACAACCCC-3′
SxMAX4G	F: 5′-CTCCAACTTGGTATGTCTCCC-3′	JN613468	Ulbricht-weide	Salix purpurea × S. viminalis	1	0006s25490
	R: 5′-GATAGCTAAATCACACAACCCC-3′

^aThe motif CACC was added to the 5′ end of all forward primers for directional cloning purposes.