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Hybrid index score

(M.trossulus)

Figure 6.3 The frequency of M. edulis, M. trossulus, and natural hybrid genotypes in two hybrid zones (i.e., "Scandinavia" and "Canadian maritime"). A score of "0" or "6" indicates the presence of only M. edulis or M. trossulus genetic markers, respectively. Note that the Scandinavian zone contains almost all hybrid genotypes, while the Canadian maritime zone contains relatively few introgressed mussels (Riginos and Cunningham 2005).

Hybrid index score

(M.trossulus)

Figure 6.3 The frequency of M. edulis, M. trossulus, and natural hybrid genotypes in two hybrid zones (i.e., "Scandinavia" and "Canadian maritime"). A score of "0" or "6" indicates the presence of only M. edulis or M. trossulus genetic markers, respectively. Note that the Scandinavian zone contains almost all hybrid genotypes, while the Canadian maritime zone contains relatively few introgressed mussels (Riginos and Cunningham 2005).

factor. Neither hypothesis was strongly supported by the available evidence. In particular, the lack of accurate estimates of times since hybrid zone formation prevented a robust test of the alternate hypotheses (Riginos and Cunningham 2005).

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