Table 1.

Number of young duplicate gene families for three types of expansion

Species	Species-specific expansions	Lineage-specific expansions						Complex expansions																				Total
		2	2	2	3	5	6	2		3		4		5		6	6	7	8		9		10	11		11	12
D. simulans	139	+a	-	-	+	+	+	-	…c	-	…	+	…	+	…	-	+	+	+	…	+		+	…	+	+	+
D. sechellia	289	+	-	-	+	+	+	-		-		+		+		-	-	-	+		+		-		+	+	+
D. melanogaster	54	- b	-	-	+	+	+	-		-		+		+		+	+	+	+		+		+		+	+	+
D. yakuba	569	-	+	-	-	+	+	+		-		+		-		+	+	+	+		+		+		+	+	+
D. erecta	89	-	+	-	-	+	+	-		-		-		+		+	+	+	+		+		+		+	+	+
D. ananassae	150	-	-	-	-	-	+	-		-		-		+		-	-	-	+		+	…	+		+	+	+
D. pseudobsura	247	-	-	+	-	-	-	-		-		-		-		-	+	+	+		+		+		+	-	+
D. persimilis	232	-	-	+	-	-	-	-		-		-		-		-	+	+	+		+		+		+	+	+
D. willistoni	318	-	-	-	-	-	-	-		-		-		-		+	-	-	-		+		+		+	+	+
D. virilis	118	-	-	-	-	-	-	-		+		-		-		+	-	+	-		-		+		+	+	+
D. mojavensis	160	-	-	-	-	-	-	-		+		-		-		-	-	-	-		-		+		-	+	+
D. grimshawi	794	-	-	-	-	-	-	+		+		-		-		+	-	-	-		-		-		+	+	+
		29	12	143	11	5	1	21	177	5	44	3	9	1	6	1	1	1	1	3	2	3	1	2	1	2	3
Total	3159	201						287																				3647

^a Corresponding species is involved in the relevant expansion events.

^b Corresponding species is not involved in the relevant expansion events.

^c Not all expansion events are showed because of space limitation.