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Table 3 Estimates of the within- and between-flyway rates and their ratio under the 3-TRM assuming 3 flyways for each gene segment. Under the 3-TRM the ratio is equal to the within flyway rate estimate over the between flyway rate estimate. Under the 3-FRM and GRM the ratio is equal to the mean within flyway rate over the mean between flyway rate. Mean rates are calculated assuming three flyways

From: The impact of migratory flyways on the spread of avian influenza virus in North America

  3-TRM 3-FRM GRM
within between ratio within between ratio within between ratio
PB2 6.39 1.34 4.77 7.13 1.3 5.48 5.37 1.1 4.88
PB1 6.81 1.32 5.16 7.52 1.28 5.7 12.86 1.07 12.02
PA 7.47 1.41 5.3 7.75 1.39 5.58 6.04 1.12 5.39
NP 6.85 1.32 5.19 7.25 1.28 5.66 6.08 1.27 4.79
MP 9.94 2.04 4.87 10.3 2.01 5.12 8.86 1.56 5.68