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Table 5 Summary of the results from the Admixture models in STRUCTURE for artificial hybrids and backcrosses:

From: Introgression and rapid species turnover in sympatric damselflies

Admixture proportion to I. eleganscluster
Type of cross N ≥ 90 (90-68) (67-21) (20-11) ≤ 10
F1 50 0 0 50 0 0
F2 50 0 0 50 0 0
1 GB 50 0 0 35 15 0
1 EB 50 0 24 26 0 0
2 EB 50 0 30 20 0 0
3 EB 50 0 40 10 0 0
4 EB 50 0 42 8 0 0
  1. first-generation hybrid (F1; i.e. I. graellsii × I. elegans), second-generation hybrid (F2; i.e. F1 × F1), first backcross with I. elegans (1 EB; i.e. F1 × I. elegans), first backcross with I. graellsii (1 GB; F1 × I. graellsii), second backcross with I. elegans (2 EB; 1 EB × I. elegans), third backcross with I. elegans (3 EB; 2 EB × I. elegans), and forth backcross with I. elegans (4 EB; 3 EB × I. elegans).