Fig. 6

Asymmetry in reciprocal hybrid crosses inferred from mtDNA genotypes, assuming uniparental inheritance through females. The dominant mitochondrial haplogroup (as in Fig. 2) observed in each hybrid class are indicated in parentheses following the cross name. Species-specific mtDNA haplogroups are indicated below the species columns for each cross. Solid lines on arrows indicate the most common cross, dotted lines indicate less common cross