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Figure 2 | BMC Evolutionary Biology

Figure 2

From: Reassortment patterns of avian influenza virus internal segments among different subtypes

Figure 2

Reassortment rates between internal segments of different subtypes. A: PB2 segments associated with HA subtypes shown, which means PB2 that are associated with H1, H3 and H4 subtypes rapidly reassort to become associated with any HA, while PB2 associated with H5, H6, H7 and H9 subtypes reassort more slowly to become associated with any HA. B: PB2 segments associated with NA subtypes shown; C: PB2 segments associated with combined HA- NA subtypes shown; D: NS segments associated with combined HA- NA subtypes shown. Reassortment rates are shown as a heat map. Both forward and reverse rates are shown, with subtypes labeled on the left side acting as donors and subtypes labeled at the bottom acting as recipients. The values of the mean reassortment rates, in exchanges per year, are represented as colors from yellow (low) to red (high). The scale of rates is on the left hand side of each plot.

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