Table 1.

Distribution of colours among synteny blocks.

	genome
	peach	cacao	grapevine	castor bean	strawberry	papaya	poplar
genes in synteny blocks	4326	2878	2435	2147	1576	1098	5202
% genes coloured	83	90	88	90	82	90	86
% genes coloured in coloured blocks	87	91	88	92	84	91	88
number of blocks (most counted 2X)	481	362	247	267	225	160	1155
% one colour	79	96	97	93	85	94	74
% no colour	12	1	1	2	4	1	19
% different colour	9	2	2	5	10	4	7
number of gene pairs (most counted 2X)	5121	3143	2709	2347	1638	1110	7273
% in coloured blocks	93	99	100	98	97	98	98
% same colour, different region	74	84	77	83	71	81	75
% same colour, same region	1	0	0	0	1	1	5
% one gene coloured	9	11	21	12	15	12	12
% neither coloured	7	1	0	2	3	2	2

Grapevine, cacao and peach coloured independently; the ranges of the coloured regions determined by inspection of the self-comparison dot-plots; for the first two, these correspond as closely as can be determined to the ranges displayed in [1] and [3]. The other four genomes are coloured according to homologies with the first three. Peach ranges are more difficult to distinguish than those of grapevine and cacao, accounting for the somewhat elevated number of blocks of different colors, and this ambiguity is projected via the coloring process onto strawberry and poplar.