Table 1 AMAT expression, MA accumulation and status of various AMAT indels in ‘Concord’, ‘Catawba’, ‘Semillon’, ‘Merlot’, and other germplasm accessions

Cultivar or germplasm	Pedigree (from NPGS, GRIN-Global, USA)	Indel status^a		Relative AMAT expression		Relative MA content		3 kb promoter deletion (Yes:Y; No:N)	TRIM Insertion in exon 2 (Yes:Y; No:N)
Cultivar or germplasm	Pedigree (from NPGS, GRIN-Global, USA)	426 bp indel (position ‘−2595’–> ‘−2164’)	42 bp indel (position ‘−354’–> ‘−313’)	Mean^b	SE	Mean^b	SE	3 kb promoter deletion (Yes:Y; No:N)	TRIM Insertion in exon 2 (Yes:Y; No:N)
'Concord'	Vitis hybr., V. labrusca x Catabaw	0/0	42/42	28.08	0.88	58.38	5.25	N	N
'Catawba'	Vitis hybr., V. labrusca x V. vinífera	0/“-“	42/“-“	16.37	2.72	1.51	0.10	N	N
'Semillon'	V. vinifera	”-“/“-“	”-“ / “-“	0.01	0.00	N.A	N.A	N	N
'Merlot'	V. vinifera	426/“-“	42/“-“	1.00	0.20	1.00	0.38	Y	N
Hybrid group 1 (7 hybrids)	hybrids involving V. labrusca	0/0 or 0/“-“	42/42	19.56	3.18	18.42	7.55	5 N, 2Y	7 N
Hybrid groups 2 and 3 (14 hybrids)	hybrids involving V. labrusca	0/400 or 0/426	42/42 or 0/0	12.80	2.58	3.66	1.75	14 N	13 N, 1Y
Hybrid group 4 (11 hybrids)	hybrids involving V. labrusca	426/426 or 426/“-“	42/42, 0/42, 0/“-“ or 42/“-“	2.53	1.37	1.148	0.50	9 N, 2Y	7 N, 4Y
V. vinifera and others (5 species, 7 accessions)	Non-V. labrusca species	426/426 or 426/“-“	42/42, 42/“-“ or “-“/“-“	0.71	0.41	1.23	0.57	6 N, 1Y	6 N, 1Y
V. Labrusca (9 accessions)^c	V. labrusca	0/426	42/42, 0/42, 0/0	N.A	N.A	36.90	10.24	N	N

^aIndel positions are illustrated as in Fig. 4; two alleles are separated by “/“ and each allele status is indicated by presence of a sequence (426 bp, 400 bp, or 42 bp) or absence (0); “-“ means an allele which was not detected at that region
^bAMAT expression and MA content were calculated as folds of change in relative to that of ‘Merlot’
^c‘Alba’ was not included in this list due to lack of its MA content assay resulting from poor fruit set; some of the accessions might not be true V. labrusca (Supplementary note 2)

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