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Table 1 Number of young duplicate gene families for three types of expansion

From: Functional requirements driving the gene duplication in 12 Drosophila species

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
  1. a Corresponding species is involved in the relevant expansion events.
  2. b Corresponding species is not involved in the relevant expansion events.
  3. c Not all expansion events are showed because of space limitation.